dialogue: Mr. Adams: Dental clinic. This is Mr. Adams.
  David Johnson: Hi. My name's David Johnson. I'd like to make an appointment.
  Mr. Adams: All right, David. Is this for a checkup or a cleaning?
  David Johnson: A checkup. I think I have a bad cavity. Half the side of my head hurts.
  Mr. Adams: What tooth is giving you pain?
  David Johnson: One of the back ones.
  Mr. Adams: Let me see. . . We can see you this afternoon if you can come in at four thirty.
summary: David Johnson calls Mr. Adams to make an appointment for a checkup.