This project is a multi-user chat program which is started like a chatbot but then actual human user takes over the control. It should have a admin panel where chats could be managed by logged in admin. Please reach out only if you have done a similar project. The most important is that it must not use any 3rd part tool.
The 100% payment is done only when the project is demonstrated (video should work).
I've made chatting systems before that making that chat-bot for you website shouldn't take me more than 1 week, get in touch to discuss in detail when free to do so.