Task: Dialogue State Tracking
Input (English): Buyer: Hello. I'm interested in the hospital bed. Can you tell me about it?
Seller:  it is in excellent condition. It is fully adjustable It adjust at the head knees and height as well. It also has rolling wheels for easy moving. The mattress is very nice. It comes with side rails. It breaks down into 3 sections so when you pick it up you should be good if you are in a station wagon, mini van or SUV and I will be willing to help you load it
Buyer: Did you obtain this bed from a hospital or a medical supply store?
Seller: I purchased it from a medical supply store. 
Buyer: Why did you need such a bed?
Seller: My husband had to use it for a short time after a surgery he had. He is now recovered and we no longer need it.
Buyer: How long was he in the bed?
Seller: He used it for 10 weeks. So it is still like new condition.
Buyer: How old is the bed?
Seller: We purchased it about 4 months ago in preparation for him needing it for his surgery.
Buyer: It's a drive for me to come to Sunol. Would you be willing to take $400 for the bed to cover my gas expense?
Seller: I have someone else wanting to come look that is willing to pay more, If you are really in need of the bed I can deliver if you pay asking price of $525 or I can take $450 if you come pick it up and I help you load.
Buyer: I would be willing to do the $450. 
Seller: 
Buyer: 

Output (English): accepted