Tell your travel agent what preferences you have for seating. First or second, number of people at the table, round or oval, and which level. On the first day go to the dining room and find your table. Then number of your table and name of the dining room (there is a different name for each level) will be on your seapass. If you really don't like it you can request a change. You will see people standing in line waiting to do this. It's usually after 3PM when you can do this. If you're going to be with your family where shouldn't be any issues other than location. It's really very easy.