answer: #Person1# asks #Person2# to cover for #Person1# two hours because #Person1# has to see s dentist. #Person2# agrees.
documents: #Person1#: Could you please cover for me two hours this morning?
  #Person2#: Sure. Any specific reason I should know about in case people ask where you are.
  #Person1#: I have to see the dentist. We have an appointment for this morning from 9 to 11 o'clock. So if there is any phone call, please pick up for me. If there is something urgent, tell them I will be back in two hours.
  #Person2#: No problem. Good luck.
  #Person1#: Yes, I will need it. Thanks.