开头：Excuse me ,sir/madam!can I interview you for few minutes?
（等待回复）
如果别人答应的话：Well,you know ,our country will hold Olympic Games in August 8th,208~How do you think about...(开始切入正题~)
问完后：It's very glad to talk to you ,thank you for your patient ,I'm looking forward to ours meeting in that day~see you!
这样应该就行了吧~希望对你友帮助!