注意下面雅思听力测试的某一语段中的黑体词：
Clerk: Can I help you this evening, sir?
Traveler: Yes, please. I'd like... I'm traveling to San Francisco.
Clerk: OK, do you have your tickets already this evening?
Traveler: Yes ,I do.
Clerk: OK, sir, would you like smoking or non-smoking seats this evening?
Traveler: Er, no smoking please.
Clerk; OK, this evening you're going to be traveling out on flight 317. Your seat is 17A,
non-smoking，window.
Traveler: Thank you very much indeed. Do you need to see my passport?
Clerk: Ah，no sir.
Traveler: Thank you very much.
Clerk: Was there any bags you'd like checked this evening?
Traveler: Yes, please, one.
Clerk: OK. Is your name and address on your bag, sir?
Traveler: Yes, it is.
Clerk: OK, that'll be one bag checked to San Francisco this evening. Your claim check is
stapled in the back of your ticket jacket. Your flight will be departing out of Gate
22 this evening. Boarding time is 6:40 and your flight leaves at 7 0'clock.
Traveler: Thank you very much indeed.
Clerk: OK, have an enjoyable flight this evening.
注意上面对话中的黑体，它们都是本段听力中的重要信息，抓住这些重要的词，我们考生将得心应手。
