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.

Context: 'Since this is the first time for the family to be camping, having plenty of food for everyone is on the top of my list.' 'I am fine with you having the 3 foods. Is it okay if I have 3 water units We are fasting and need lots of hydration.' 'Are you sure you need all of the water? It would be nice to have some extra.'
Utterance: 'Well, we do need the water pretty badly. But I guess wanting all the water is stingy so I will pack extra water since we are not packing food. How about you guys receive 1 water and 3 food units?'
Yes

Context: 'My favorite thing to do is sing songs and tell stories around a campfire.  Consequently, I was really hoping to get some additional packages of firewood. 🙂' 'I do love sing alongs around the campfire. I usually go hiking and it requires a lot of energy and fuel. Maybe I can get additional food packages?' 'You'll definitely need some additional calories if you want to do extra hiking.  I will give you all the additional food if you give me all the additional firewood. '
Utterance: 'Sounds like a deal, maybe split the water packages evenly. Can't be dehyradated while camping 🙂'
Yes

Context: 'hi i am good how about yourself🙂' 'Pretty good. Ready for this camping trip!' 'as ready as I can be hiking with 3 teenage boys..lol how about you?'
Utterance: 'Haha, yeah I can't wait to go. I really need lots of food and a bit of firewood. What do you need?'

No