To modify your Royal Caribbean reservation, get in touch with their customer service at 1 (877) 350 4939 (US) or +44 (20) 39003980 (UK). They can assist with changing your travel dates, adding guests, or other adjustments. Additionally, some changes can be managed online through your Royal Caribbean account.

https://www.alaskaeaf.org/forums/support-forum/ae9a3ce4-04e5-ef11-b542-0022480868ff