Task: Dialogue State Tracking
Input (English): Buyer: Hello im interested in your bike. How old is it
Seller: The bike is a year old. I bought it used a few months ago.
Buyer: Do you know how long the other owner had it? Are the tires and paint good?
Seller: He received it as a Christmas gift in 2016. The paint is in excellent condition. I did not replace the tires before putting it up for sale so I would knock $40 off the price so you can replace them.
Buyer: Well its a bit old. Unfortunately I only have $150.00 How does that sound?
Seller: I don't think I want to go quite that low. Would you be willing to do $200?
Buyer: I guess I can do that, thank you!
Buyer: 
Seller: 

Output (English): accepted