"bookee" calendar times, not person's doing booking

Hi, we are (urgently) trying to create a Booking calendar so people from anywhere in the world can attend a clinic to discuss a specific technical area, with one of our technicians, who are also all over the world.

I cannot find a way to make the calendar reflect that of those who are being booked, but there are plenty of options for allowing the calendar of the person making the booking.

Anyone got any ideas about this?

Thanks in advance.