Reflection specialty Dining

My wife tried to book a package for Specialty Dining now. There is a special price for 3 restaurants at a lower price.

But when we called and spoke to a live person (not a bot) we were told that you can’t reserve ahead what time for dinner.

This person said to save money, you have to wait till on board and “take a chance” you will get the dinner time you want.

Is this true???