The input is taken from a negotiation between two participants who take the role of campsite neighbors and negotiate for Food, Water, and Firewood packages, based on their individual preferences and requirements. Given an utterance and recent dialogue context containing past 3 utterances (wherever available), output Yes if the utterance contains the vouch-fair strategy, otherwise output No. vouch-fair is a selfish negotiation strategy. It is used to call out fairness for personal benefit, either when acknowledging a fair deal or when the opponent offers a deal that benefits them. This can be through an explicit call out or can be implied.

[EX Q]: Context: 'Hello, how are you?' 'Im good how are you?' 'I'm doing great, thanks.'
Utterance: 'How many of each supply would you like? what is your favorite?'
[EX A]: No

[EX Q]: Context: 'Well, that's a bummer. How are you set for food? While I wouldn't mind a bit more, I'm in pretty good shape there, so I'd be willing to trade it for water. I'd hate to leave without getting a good hike in.' 'Hun,It's a bit of a fair deal,but due to the condition here i will need a bit more of water though foo cannot be overlooked also for survival but still to survive we take chances.So do you mind me giving you a package of food and u trading 2 pakages of water?.' 'Well, I tell you what, I'd be willing to take 2 packages of water and 2 of firewood and leave the rest to you, including all of the food. How does that sound?🙂'
Utterance: 'ok nice good deal'
[EX A]: No

[EX Q]: Context: 'I think our dealing is going good. You take all the firewood.As I already said, I have some health issue.  Can you help me with the food?' 'Sounds good I will give you the 2 packages of food.🙂' 'So nice of you !!  Now can you summarize your needs?'
Utterance: 'I will need 3 packages of firewood. 1 package of food and 1 package of water. What are your needs?'
[EX A]:
No