When a passenger requests a change of reservation， you find there are no available seats on the desired flight. What do you say？

When a passenger requests a change of reservation， you find there are no available seats on the desired flight. What do you say？
A.Sorry， there are no seats available on that flight. Would you like to consider other options？
B.Too bad， you're out of luck.
C.You can't change then.
D.I don't know what to do.
正确答案：A
试题解析：先表达歉意，再提供其他选择，体现了服务的专业性和灵活性。