I ran into this (or a similar service) when cancelling comcast a few weeks ago. It worked _really_ well. It was slightly uncanny, but I think most people wouldn’t notice anything. It was only some awkward phrasing that made it obvious to me.

I wonder about latency especially. Does the AI wait for sentences to finish?

Found a video from a couple years back using this tech. Wasn't Telus in the video but they demonstrated it and the change was subtle but definitely noticable. See how it was 2 years old I am certain the technology has greatly improved since that time.