By - Dry_Back_1116
You could use a platform like Cognigy. They have a nice trial service. Of course, enterprise usage licenses are very expensive with these types of platforms.
[Rasa](https://rasa.com/) is an open source library to build chatbots. It is fairly easy to use and comes with pre-built modules. There are many tutorials/videos available to use Rasa as well.
Gpt2 fine tuned. Or gpt-j.