I've had tickets booked for me via Expedia. All of the flights have SQ flight numbers incl. NZ domestic sectors and a AKL-SIN leg operated by NZ. The SQ booking reference is in the ticket provided, but I cant add the booking to my Air NZ app to add FF number, seat select NZ flights etc. I have tried using the SQ and NZ flight number for the flight to find the booking, with no luck. I tried putting the booking in checkmytrip.com, but it only has an SQ booking ref. Any other suggestions?