Many Google Duplex calls are from real people instead of AI
 

Google's Duplex reservations might be more widely available, but that doesn't mean the AI is ready to handle every call. The company has confirmed to the New York Times that about 25 percent of the Assistant-based calls start with a human in a call c...

https://www.engadget.com/2019/05/22/...ade-of-people/