We just changed our booking from Island Princess August 5, 2024 to Sun Princess August 10, 2024. Before changing from the the Island, I was able to book My DIme Timing for the same time each night. Once I changed to the Sun Princess, I am not able to book any times either same time each day or individual nights. Is there some time frame for the larger ships in selecting dinning reservervations int he main dinning room? I have called Princess and the agent ws unable to make any bookings and just told me to make them closer to sailing or once on board. I'm concerned it is a promblem with my reservation and if I wait until on board, there will not be desirable times available.