answer: #Person1# and #Person2# plan to take the underground together to the conference center because Mr. Ewing asks them not to be late.
documents: #Person1#: Mister Ewing said we should show up at the conference center at 4:00 o'clock, right?
  #Person2#: Yes, he especially asked us not to be late. Some of the people from our east york branch office are coming, and he wants to make a good impression on them. How are you getting there?
  #Person1#: I was thinking of taking my car, but I think I'm just going to take the underground, because there is construction on the highway. What about you?
  #Person2#: I'll be taking the underground as well. Why don't we go together? I've been to the conference center only once, and I'm not sure if I can find my way around there.