I once worked at an IT-Service hotline. I answered a call like I always do and after my standard greetings phrase the customer said nothing so I asked "hello? Are you still in the line?".
The customer replied "oh wow you are a real human! I thought it was a band announcement!"
Later he explained that my voice was so perfect that he thought it was a remastered recording and that I could easily work as a radio moderator.
so you could say something like:
Oh wow your voice sounds so perfect/good/nice/great. You could work as a radio presenter/moderator.
With this you make him a compliment and don't offend him. An AI can't answer probably to that (in general).
AIs in general are still pretty dumb, they have great difficulties in detecting irony, humor and stuff like that. Even logical or combined questions are difficult for them.