People are prejudiced against talking to bots because of how bad they are currently. I despise calling services that have voice recognition, often times it's easier to have an options menu.

If they can get a way of saying "I'm a bot" without people hanging up the calls, I'm all for it -- otherwise, "I'm calling for a client" or similar is the best for everyone involved (assuming everything works).

Businesses also need to have a way to report problems to Google, like if they are getting spammed by Duplex or want to opt out.