My DH and I are going on Royal Caribbean Mariner of the Seas with our 3 daughters, husbands and 6 grandkids. Our reservations were made with different travel agents. Our reservation says we have open dining. Since we are new I’m not sure how to get the 4 different cabins linked with the same dining time. Is that possible? Could someone please walk me through what I need to do. Thank you! Diane