I'm sure most of us have only been to the CC interviews, so can't really give you any advice on the phone interview.
But I can give you one piece of advice.
If you do get the job, next time your in Sydney, keep your eyes open for a lovely guy, with extensive customer service experience with a warm and vibrant personality. He's been to 5 open days without any luck,
and the poor boy "just wants to fly"!