@KuppiReddygariSamthrushaReddy-3789 The options to add yes/no button in the user interface from the deployed bot from QnAMaker or Language service "Publish" bot option is not available by default.
You will have to add update your bot to add additional workflow or buttons and then republish the bot and use this data for processing on the client side.
However, every QnAMaker or Language service bot has an option to use the active learning feature of the service. This feature will basically use the queries of the user and compare them with the existing KB QnA pairs and suggest possible questions that customers could ask, and you will have the ability to approve or reject the suggestions from the backend from your KB. Please look at the following links for QnAMaker and Language service to enable the same and use the functionality.
https://learn.microsoft.com/en-us/azure/cognitive-services/language-service/question-answering/tutorials/active-learning
https://learn.microsoft.com/en-us/azure/cognitive-services/qnamaker/how-to/use-active-learning
Please ensure that your deployed bot is tested thoroughly to ensure such suggestions are populated by the model or KB. If there aren't enough queries to the bot active learning would not have enough suggestions to display. I hope this helps!!
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