听力原文:W: Could you tell me the time of the last plane to New York this evening? M: There's one at 9:20, but it's fully booked, I think. W: Then the time of the first plane tomorrow morning? M: The first plane leaves at 7:30. W: Can you tell me when it arrives so that I can ask my secretary to come and meet me? M: It arrives at 10:30, but maybe a little late because of the bad weather. W: Well, I wonder if you'd let me know if there's any change on that flight, I'd appreciate it. M: Yes, of course. What's your room number? W: 609. Thank you. Why doesn't the woman take the last plane in the evening?