Microsoft Bookings - how to change the words "Select service"

Not sure if this is in the right place, but I couldn't find a direct navigation route to getting help/assistance with Microsoft Bookings, part of the Office 365 suite.

I want to create a Bookings page for impromptu meetings in a specific conference room. There is a tablet mounted right outside of the conference room that shows the schedule for the day. If someone wishes to book the room during an open time slot, they will press a link on the tablet which will open the Bookings page. The only issue is that the default Bookings page says "Select Service" and I want to change that to something like "Select Meeting Duration". Obviously, the choices for "service" will be a 1/2 hour meeting, 1 hour meeting, 2 hour meeting, and so on.