I have a more questions since it’s my first time booking with AS. I see availability for YVR to NRT but I also want to go to SIN but no availability yet. Wanted to confirm that I can first book YVR to NRT and then later call to add NRT/HND to SIN? Would they automatically treat Tokyo as the free stopover? Also want to ask how can I calculate the Mike’s required for YVR-NRT/HND-SIN. TIA!