answer: #Person1# wants to rent a car without a reservation, and #Person2# suggests #Person1# rent a car for 7 days with a discount.
documents: #Person1#: How may I help you?
  #Person2#: Hi, I would like to rent a car.
  #Person1#: Sure, did you make a reservation?
  #Person2#: No, I decided to rent one when I got off the plane just now. Is that OK?
  #Person1#: Of course. I was just checking. So how many days do you need the car for?
  #Person2#: Can I just do 4 days for now and make the rent longer through a phone call later?
  #Person1#: In that case, I suggest you go for 7 days, which will give you a 20% discount. And if you choose to return the car after 5 days, you can get the rest of your money back.
  #Person2#: OK, I will do that. Can I return the car at the train station?
  #Person1#: Yes, you can.