answer: #Person2# tells #Person1# the timetable for the bus may have been changed and #Person2# gives #Person1# the wrong telephone number of the bus company by mistake.
documents: #Person1#: What time does the bus leave for the airport?
  #Person2#: I don't know. It used to leave every half hour, but I think the timetable has been changed.
  #Person1#: Do you know the telephone number of the bus company?
  #Person2#: Yes, I do. It's 350-688-4700.
  #Person1#: I'll try it. Ur... They don't seem to answer.
  #Person2#: I think it's too early. I don't think they open until 9:00 o'clock.
  #Person1#: But it is 9:30 now.
  #Person2#: Maybe I made a mistake. Let me check it. I'm sorry the number is 350-686-4700.