I think the key is "they did ask...." Completely up to you. Compare this with the Carnival cruises we have been on, where they stack up people at long tables as they come in the door, for a very unfriendly experience. People are coming and going from your table as you eat, people arriving at different times that seems to result in constant activity at the table, no time to relax and enjoy the meal. We really didn't like that.
Compare with Disney where you have a private table, eat at leisure, in an elegant restaurant with a really nice menu. We have been asked only once if we wanted to sit with others.