Language Knowledge Base https://language.cognitive.azure.com/
Microsoft Lab and Education practical materials could be found here
Microsoft Lab could be found here: https://microsoftlearning.github.io/mslearn-ai-fundamentals/Instructions/Labs/07-question-answering.html
Allows you to upload knowledge base and enrich your bot with Question-Answer pairs.
Chit-chat allows you to prepopulate the your Knowleddge Base (KB).
It could be a start point for your chatbot personality.
Adding chit-chat to your bot makes it more conversational and engaging.
More here: https://learn.microsoft.com/en-us/azure/ai-services/qnamaker/how-to/chit-chat-knowledge-base?tabs=v1
Knowledge base support importing and exporting: https://learn.microsoft.com/en-us/azure/ai-services/qnamaker/tutorials/export-knowledge-base