I'm not sure what to do. So recently I booked airfare through Aeroplan for a flight to Boston. It's actually two UA flights that will take me from YVR-BOS. I had a hunch that I might have to login to UA's website, but the problem is that I don't see a confirmation number in my e-ticket. The booking reference doesn't work. So I went to AC's website and then tried it, but it tells me that I can't. I want to login and see if I can still pick a seat and or check-in. My flight will be later this Wednesday.