How to build a Chatbot?

HI Team,
Like to know what are the techniques used in building a chat bot as below

you can navigate the below url and suggest me to proceed and build

insights much appreciated.


Ask authors. Or read blog and documentation on this page - maybe there will be information. If they share source code then download it and read source code.

But frankly, if they want to make money on it then they will hide this information and you can’t get it.

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