Here found it. I saw something else 2 months ago but this is the same thing. You could use this as a base for your chat bot.
Then this for a keyboard:
https://forum.creative.gimkit.com/t/how-to-make-a-working-keyboard-difficulty/4592
And maybe make a trigger so when a certain phrase is made the trigger checks it and sends a message back. But this a very hard and memory inducing thing.