dialogue: Darin: I'm now at the airport to meet Mr. Dale, who is arriving at 3:00 PM. There will be some calls for me while I'm away. So please take a message.
  Lovell: Certainly. What time will you be back?
  Darin: Well, if the plane arrives on time, and then I'll be back around 5:30 PM.
  Lovell: If there is some urgent business, how can I reach you?
  Darin: I'll call it again. Just to make sure.
  Lovell: All right.
summary: Darin asks Lovell to take a message if there are calls for Darin.