I'm looking at booking a HKG-YVR flight using my 30%-off Prestige coupon. The lowest fare class I have been able to find is B. I checked and the availability for the flight on May 25 is J7 C0 Y9 M9 B9 H9 V9 Q9 L9 N1 U1 R1 I1 G1. Doesn't that mean there should be lots of H, V, Q seats available? I called AC for a price quote and it was for C$26xx for a B-class ticket. Is there any way I can get the lower classes but still be eligible to use the coupon?