Hello lambiengcode,
Thank you for this wonderful code for the chatbot.

Please I have noticed on the app, anyone that have installed the app is able to see the conversation of other users with the Chatbot.
For example, I asked a question on my own app and my 20 testers are able to see my interaction with the bot.
I investigated the problem further and I found out I could also see what they are also charting with the bot.

This was tested on Huawei Andriod phone and on Android emulator