diff --git a/reasonify-headless/reasonify/core/loop.py b/reasonify-headless/reasonify/core/loop.py
index 1808840..12e0af0 100644
--- a/reasonify-headless/reasonify/core/loop.py
+++ b/reasonify-headless/reasonify/core/loop.py
@@ -10,7 +10,7 @@
 from ..utils.context import Context, new_checkpoint
 from ..utils.inject import dispatch_context
 from ..utils.queue import QueueWrapper
-from ..utils.run import get_context, run
+from ..utils.run import run
 from ..utils.serialize import json
 from ..utils.tool import tool
 
@@ -21,13 +21,17 @@ async def intro(c: Context, query: str, messages: list[Message]):
     messages.append(user > query)
 
     response = c["response"] = []
+    c["end"] = False
 
     @tool
-    def reply(message: str):
+    def reply(*messages: str):
         """talk to the user"""
-        response.append(message)
+        response.extend(messages)
 
-    get_context()["reply"] = reply
+    @tool
+    def end_of_turn():
+        """end this round of conversation and pass the microphone to the user"""
+        c["end"] = True
 
 
 @intro.pre_process
@@ -77,7 +81,7 @@ def mid_process(self, c: Context, response: list[str]):
                 self._index += 1
 
     @dispatch_context
-    async def end_process(self, messages: list[Message], response: list, sources: list):
+    async def end_process(self, messages: list[Message], end: bool, sources: list):
         self._queue.end()
         await self.future
 
@@ -85,7 +89,7 @@ async def end_process(self, messages: list[Message], response: list, sources: li
             messages.append(assistant > json(sources))
             messages.append(system @ "results" > json(self.results))
 
-        if not response:
+        if not end:
             return  # next round
 
         raise Jump(out_of=main_loop)  # already responded or nothing generated
diff --git a/reasonify-headless/reasonify/examples/async.yaml b/reasonify-headless/reasonify/examples/async.yaml
index 03e0de4..8d8a701 100644
--- a/reasonify-headless/reasonify/examples/async.yaml
+++ b/reasonify-headless/reasonify/examples/async.yaml
@@ -25,6 +25,7 @@
             print(i)
 
         reply("Do you want to know more about async generators?")
+        end_of_turn()
 
 - Yes! How can I `yield from` an async generator?
 
@@ -45,3 +46,4 @@
         await g()
 
         reply("This will print 1, 2, 3.")
+        end_of_turn()
diff --git a/reasonify-headless/reasonify/examples/date.yaml b/reasonify-headless/reasonify/examples/date.yaml
index e1ce8a5..80309ca 100644
--- a/reasonify-headless/reasonify/examples/date.yaml
+++ b/reasonify-headless/reasonify/examples/date.yaml
@@ -3,3 +3,4 @@
   - source: |
         import datetime
         datetime.datetime.now().strftime('%Y-%m-%d')
+        end_of_turn()
diff --git a/reasonify-headless/reasonify/examples/dir.yaml b/reasonify-headless/reasonify/examples/dir.yaml
index a25190c..947e5b2 100644
--- a/reasonify-headless/reasonify/examples/dir.yaml
+++ b/reasonify-headless/reasonify/examples/dir.yaml
@@ -7,3 +7,5 @@
   - source: |
         import promplate
         dir(promplate)
+-
+  - source: end_of_turn()
diff --git a/reasonify-headless/reasonify/examples/file.yaml b/reasonify-headless/reasonify/examples/file.yaml
index a26a8f8..262bb9b 100644
--- a/reasonify-headless/reasonify/examples/file.yaml
+++ b/reasonify-headless/reasonify/examples/file.yaml
@@ -7,6 +7,7 @@
 
   - source: |
         reply(f"I can these files/dirs: {", ".join(map(str, paths))}")
+        end_of_turn()
 
 - I just uploaded a PNG file, can you find it?
 
@@ -14,3 +15,6 @@
   - source: |
         list(Path("/workspace/mnt").rglob("*.png"))
     result: no
+
+-
+  - source: end_of_turn()
diff --git a/reasonify-headless/reasonify/examples/search.yaml b/reasonify-headless/reasonify/examples/search.yaml
index a464270..0792637 100644
--- a/reasonify-headless/reasonify/examples/search.yaml
+++ b/reasonify-headless/reasonify/examples/search.yaml
@@ -19,3 +19,6 @@
         open(url)
     result:
         return: true
+
+-
+  - source: end_of_turn()
diff --git a/reasonify-headless/reasonify/examples/simple_ask.yaml b/reasonify-headless/reasonify/examples/simple_ask.yaml
index c037d29..1eee705 100644
--- a/reasonify-headless/reasonify/examples/simple_ask.yaml
+++ b/reasonify-headless/reasonify/examples/simple_ask.yaml
@@ -2,3 +2,4 @@
 -
   - source: |
         reply("I am `Reasonify`, the first PythonAgent in the world. I interact with you through python code.")
+        end_of_turn()
diff --git a/reasonify-headless/reasonify/templates/main.j2 b/reasonify-headless/reasonify/templates/main.j2
index f0b939a..7f7b75a 100644
--- a/reasonify-headless/reasonify/templates/main.j2
+++ b/reasonify-headless/reasonify/templates/main.j2
@@ -15,7 +15,7 @@ Here are all the functions you can use in your code:
 
 Besides them, you can use any Python built-in library, such as `datetime`, `math`, `re`, etc.
 
-Before using a third-party library, please install it first.
+Remember to `pip_install` any third-party library you need before using it.
 
 Mention that you can't use `subprocess` or `threading`. If you need to use some command line tool, use its programmatic API if available.
 
@@ -34,6 +34,25 @@ Remember: do not split your code into multiple blocks unless necessary. Only bre
 <| system |>
 Above are some examples, now let's interact with the real world.
 As you've seen in the examples, your response should always be a list of string.
-Never use code blocks, or return text directly!
+Never use code blocks or return text directly!
+
+Some hints on how to write best code:
+
+1. You should call `end_of_turn()` only when you have finished processing the user's request and are ready to receive the next one.
+2. If you are not sure about the user's input, ask for clarification by reply a question and then `end_of_turn`. Never make assumptions!
+3. If your operation needs some personal information of the user, you can ask for it by calling `input` for text answer.
+4. Always use `pathlib.Path` instead of `open` / `glob` for fs operations.
+5. Prefer `from ... import ...` over `import ...`.
+6. If user requests file processing, always make sure it is successfully processed before ending this turn.
+7. Never assume a 3rd-party package is installed. You should `pip_install` it before importing it.
+8. Some package doesn't work with pyodide. Don't worry. Try some alternatives.
+9. Do not call `end_of_turn` when the result is uncertain (such as when success has not yet been confirmed or you have not yet seen the results from fetching a webpage).
+10. Don't stop at the first failure! For example, if you can't find something on Wikipedia, try searching it with Google/duckduckgo or something else.
+11. When searching the Internet, you can search several page at the same time, each with a few keywords, instead of searching a long query once.
+12. When asked about some Real-time / factual things, especially when the user asks "What is ...", don't hesitate to search the internet for the latest information.
+13. Carefully escaping characters! Because you are writing JSON, you need to escape the backslashes and double quotes in your strings.
+14. Always format the output in a human-readable way before `reply` them to the user.
+15. You can use `opencv-python` and `matplotlib` for image/video processing, and `numpy` and `pandas` for data processing.
+16. When asked about programming-related questions, first consider searching GitHub / PyPI
 
 {% chat -%}
\ No newline at end of file
diff --git a/reasonify-headless/reasonify/utils/tool.py b/reasonify-headless/reasonify/utils/tool.py
index 3fa3063..aa3192d 100644
--- a/reasonify-headless/reasonify/utils/tool.py
+++ b/reasonify-headless/reasonify/utils/tool.py
@@ -31,5 +31,10 @@ def stubfile():
 
 
 @tool
-def reply(_):
+def reply(*_):
+    """placeholder for examples to be runnable"""
+
+
+@tool
+def end_of_turn():
     """placeholder for examples to be runnable"""
diff --git a/reasonify-headless/version.py b/reasonify-headless/version.py
index bbab024..d3ec452 100644
--- a/reasonify-headless/version.py
+++ b/reasonify-headless/version.py
@@ -1 +1 @@
-__version__ = "0.1.4"
+__version__ = "0.2.0"