What will happen if my cabin mate can not go, but I still want to go?
You have 3 choices: 1. Find another person to go with you. You can switch cabin mates up until final payment without any penalty. 2. Find some friends who will allow you to bunk with them. The third and forth passengers in a cabin are less expensive than the first two. 3. Pay a single supplement, which is 200% of cabin price.