answer: The taxi driver makes a stop at Union Square to pick up #Person1#'s friend and then takes them to Central Park.
documents: #Person1#: Taxi.
  #Person2#: Yes. Where would you like to go?
  #Person1#: Central Park, please, but can you make a stop at Union Square? I wanna pick up my friend there.
  #Person2#: Of course.
  #Person1#: How long do you think it will take to get to Union Square.
  #Person2#: Well. That depends on traffic, you know. It's pretty heavy this afternoon.
  #Person1#: Can you make it in 15 mins. I am already 10 mins late.
  #Person2#: I'll try. Where exactly is your friend waiting?
  #Person1#: On the 14th Street side. Oh, we are already at the 16th Street. You are fast. Can you make a left at the next corner?
  #Person2#: You've got it.
  #Person1#: I think he is around here. Can you slow down? Ah, there he is.
  #Person2#: Here we are, Central Park!
  #Person1#: Thank you. How much is it?
  #Person2#: Well, it's $ 12.
  #Person1#: Here's $ 15. Keep the change.
  #Person2#: Thank you.