里數換機票的話係咪除左打電話外，網上換都可以 (因我想換港龍的機票)?
係咪網上訂位時話有機位就表示可以換? 訂完後需唔需要事後再打電話confirm 機位

yes, u will know the result immediately, no need to re-confirm.

記住換咗後miles 都要等一個禮拜後先扣

一個禮拜後先扣 意思係咪一個禮拜至扣我戶口既 miles?

i see. i redeem the ticket thur CX website instead of calling MPC, so it made the difference.

明白晒了，今晚就訂飛先 thanks