how a bot can repeat a question to a user in order to retrieve missing information

[ali-issa99]

Hello, what feature can we use in LangChain, in case we want the bot to ask for missing information in the user's input? is it possible with callbacks?

For example, if I am using a route Chain, where the bot needs to choose between three options, and in case the first option was the right path to go through, but at the same time we have some missing information, how are we able to retrieve the missing information then continue with the first option?

Thank you.

[oddrationale]

If you want to ask for human input every time, then you can consider using the HumanApprovalCallbackHandler. If you want an agent to decide/guess when to ask a human for more input, then look at Human as a tool.

[ali-issa99]

Appreciate your suggestion @oddrationale . I successfully added the tool, but it appears that the tool is generating a pop-up window, prompting me to approve the information provided earlier. Is there a possibility to replace this pop-up window or modify the confirmation format?

[oddrationale]

Yes! See this section: https://python.langchain.com/docs/integrations/tools/human_tools#configuring-the-input-function