How to add history message for optimize the question in knowledge-retrieval

[xy3xy3]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

In multiple rounds of dialogue, there may be a reference problem of the person's name. You need to eliminate the reference according to the chat history and then search.
i found that in fastgpt (another program like dify),they have a node called Problem optimizer.
But I didn't found something same in dify.
And the workflow can't import a history message variable.So it seems I can't make a workflow to solve it.

2. Additional context or comments

No response