AI Chatbot

Hey, this is more of a question, anyone knows the best/to approach way of creating a ai chatbot? In my case, i want to create a bot to chat with people, so not only i have to train him, but build a database/dataset ( the ones online are not what i want/ cant find what i exaactly want ) . Anyone knows how i should proceed? In terms of not only coding language ( python,javascript... ) , but also what libraries to use and how to train the bot/ai!