下面关于要求升舱upgrade的表述,正确的是? A: can I upgrade to business class/first class with my present air miles? B: Would you please check and see if I have enough mileages?
下面关于要求升舱upgrade的表述,正确的是? A: can I upgrade to business class/first class with my present air miles? B: Would you please check and see if I have enough mileages?
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