Adding to this - this is a necessity - Adding a Back button - call it Begin Again, Start Over - whatever is most intuitive but it is needed for all the reasons noted in the thread -

This explanation of what was coming from ZD really doesn't answer the need for the back/start over button. If we can train the bot to find articles, it seems you should be able to add a button allowing our customers to start their bot experience over. This came from ZD back in 2022:

The bot building experience will be updated where you can create bot answers as a separate flow and train the bot to recognise specific phrases which the bot will direct the end-user to that particular answer flow. This way the end-user won't be stuck in the loop, they can simply ask their question and the bot will find the best match answer flow to direct the user to, taking them to their answer quickly. We hope this update will help improve the end-user experience, helping them find their answers faster.