confirmed reservation meaning in English

已确认的预订

Good , i ' d like to confirm reservation , please
好的，我想确认一下我的预约
Did l mention l had a confirmed reservation ? this is my receipt
我不是讲过我的预订已经确认？我有收据
Passengers who have a confirmed reservation on any of our cathay pacific flights , and are holding atb2 tickets with magnetic strip
已确认了任何国泰航班的机票预订，并持有atb2机票带有磁条的乘客。