Are you asking how to book a companion reservation? If so, once you become eligible for a companion pass you have to designate a person as your companion. You have to pick a companion and can only change it 3 times a year. The first time you should be able to add the companion in your RR account on the top right corner, but will only be able to do this once you have earned it. Once the companion is assigned, you go to your reservation and there will be a link that says add companion, you add it there. You can book your flight now in anticipation of adding it once you have earned it, then add the companion after you have qualified.
