Addendum: I think booking.com tried this (maybe they still have it): https://www.youtube.com/watch?v=ftr9qW8Axiw

But me clicking a button to see the details of my booking and getting transferred to a chat interface where my click was translated to a question with a "processing" progress bar irritated me to no end. And it replies with just a partial info inside a tiny chat bubble instead of having all the info in full screen! Just give me the freaking page with my booking details, godfuckingdamnit!