I'm looking to visit NZ in June 2018, and I saw these flights available as I will fly AKL-CHC and then HKK-CHC-AKL. I would like to fly the 787-9, and in business class, if possible. Does anyone know if it is possible to book the business class (or even the Y+) on these domestic flights? Would be interesting for me as I almost never get to fly Air NZ.