Thanks all for the replies. I can see that there are interviews available at MIA for my arrival date, and there are 3+ time slots available all day. When I select the date I want, every time slot appears but I can't select any time slot to proceed with the booking - anyone have any clues as to why it is sticking at this point? I am putting in 3 interviews required and most time slots on the day have 4 interviews available, but I can't select any of them. Screenshot is for 5PM that day but the box isn't selectable.