Can you help me step by step on how to make my bot say that it doesnt know the answer for the question and make it go back to "Do you have any more questions?" if it doesnt have an answer to a question asked by a client.

Hey there, You can use an expression card right after you have queried the KB with the expression

!turn.KnowledgeAgent.answer

Make it transition to wherever you want

alrightt thanks mate

You are very welcome