Task: Dialogue State Tracking
Input (English): Seller: Are you interested in the bookcase?
Buyer: I think I am interested
Seller: I'm asking $95 or best offer
Buyer: Do you have a return policy?
Seller: No, this is a private resell item.  You can check it out at Yesteryears Marketplace Antique Store if you like
Buyer: oh, ok, do you offer a warranty of any sort?
Seller: Cash and carry.  You pickup.
Buyer: I'm thinking $30 is a fair price
Seller: It cost me $30 to bring it here.  I can't accept anything less than $75.
Buyer: Well, $45 means you still get a pretty good profit. How about that?
Seller: This is  a 6' tall, oak wook bookcase with 2 glass doors and shelves on the interior.  $75, take it or leave it.
Buyer: I know it is a great bookcase but it isn't new. It is used. That should make it cheaper...
Seller: I've dropped the price by $20 so if you want it it will cost you $75, if you don't I need to check someone else who wants to pay my original asking price.  Do you want it at $75?
Buyer: That is just way more then I am willing pay. I can go up to $65
Seller: Sorry, no deal.  I cannot accept anything less than $75 and I'm not willing to go any lower.
Buyer: ok, I can't go any higher
Seller: Alright.  Have a nice day!
Buyer: 

Output (English): rejected