Hi @tonysinghmss. You could show a thumbs up / thumbs down icon. I think it would be more useful to use that signal to help you filter conversations, so you can spend time reviewing the conversations most likely to need your attention, rather than using it for training.
Based on what I have seen, I am skeptical if a thumbs up or thumbs down signal is that useful as a success rate. Often times, users will vote negatively/positively on how a conversation went even though the assistant handled things properly because they were disappointed or happy with the resolution to their situation.
Similarly, if you ask users to rate their experience on a scale from 1 to 5, frustrated users tend to give a conversation a 1 and people that loved it tend to give it a 5, while more neutral people tend to just not rate their experience.