On what engines or technologies can I build an online course in the form of a chat?

Question

Distance learning

Well, you know, there is gopractice and the Yandex school, and everywhere there is an imitation of a chatbot. Like, someone writes to you (boss, colleague, contractor, etc.) and this is a real chat message - short and capacious. You answer and he continues. This "dialogue" lasts until you get an understanding of the task, and then the LMS throws out a text, video or interface of some tool where you can solve the problem expertly.

So what is this engine? Or who knows how to collect such things so that I only collect the learning path and fill in the materials?