Google My Business has new analytics for bookings data.
If you login to your Google My Business account and click the Insights tab. You will see a new performance report which includes a bookings tab. In this tab you can see if people booked reservations or appointments via Google Maps or Google Search
It’s not quite clear how it’s programmed to show up in accounts. As it’s showing for some hotels even though you can’t book through Google My Business. It could be that a feature is in the works to improve booking and reservation options through Google My Business. But hopefully this will all become clearer with time.