I have tried to find another thread on this topic but couldn't find one. I have an upcoming trip going from YYZ-YVR-HKG-CGK booked through Air Canada. The last leg is booked on a code share with Cathay Pacific. During the booking process, I was asked to select a seat on the Cathay flight but none of the seat selection shows on the final itinerary. Instead, it states that I must make my seat selection on Cathay's website. However, for the life of me, I cannot locate Cathay's booking reference on the itinerary sent to me by AC. I tried using both the website and the app but still cannot find it. Has anyone else run into a similar issue? I would call AC reservations, but with all the disruptions, I would prefer to DIY this if I can.