I am trying to rebook a C ticket on NZ 39 from AKL to LHR on April 5 to April 6. According to the London booking agent, the April 6 flight is full, while there are seats free on NZ 2. Seatcounter claims that the situation is exactly the opposite - the LAX connection is full, while there are 4 C and 4 D tickets free on NZ 39. Who is likely to be right, and should I continue trying to rebook? Advice appreciated!