Who reserves the flight when included in a promotion?

[ship101]

I would like to understand how it works when flights are included in a promotion, like the early-sale of the world tours.  Does Princess reserve the flights and inform you or do you reserve through EazyAir and Princess credits the fare paid?   Or what else?   Thank you for your help. 

[katisdale]

Our world cruise was cancelled due to Covid. However, we had the air included. We chose the flights we wanted through EZ-Air. We had planned to fly in a day early since the sailing was in early January of 2022.

[ship101]

Thank you!  I understand the fare would not be charged at the time of the final payment, right?