This is a massive technical achievement.   

Though is it inherently dishonest that an AI doesn't disclose itself as such to the other person on the phone?   It certainly seems that way.   

Then again, when an AI eventually IS capable of being entirely indistinguishable from a human,  shouldn't they be allowed the same rights as everyone else?   
We don't have to disclose that we are humans after all.

I never expected an app for making dinner reservations to elicit such a philosophical discussion.

Judge for yourself: