I built a chat interface in 2017 (this was with chatscript dialog trees with hole-filling and semantic search) that was ostensibly to prevent our data scientists from redundant work, ie, before they spent all day writing a SQL script, describe the job of the script and see if one already exists. The chatbot would then ask for the parameters required for a script, run the job, and then present a CSV of the returned data.

As we collected user feedback and refined the UX, we got closer and closer to an option tree that could be better represented by a drop down menu. It was kind of depressing, but I learned that the actual job of that R & D wasn't to come up with a superintelligent chatbot that replaced data scientists, it was to come up with the infrastructure that would allow data scientists to put their python scripts in a common repository to allow re-use without re-installing locally and screwing around with pyenvs.

Anyway, I'm also traumatized by my involvement with a YC startup that actually had a very good (if ENRONish) product around peer to peer energy futures trading that completely fell apart when investors demanded they make it "AI"