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: 'Hi, what is your highest priority item?' 'I would love to have extra food for my trip, bringing the family! how about you?' 'I agree, it will be tricky to find extra food while camping. I'm sure we can figure out something that works for both of us... the water is also very important to me because it's supposed to be hot. There is plenty of wood where I'm going, so you can have the firewood. Would you be willing to take 3 firewood, 1 food and 1 food?'
Utterance: 'I would like at least 2 food, how does me getting 2 food, 1 water,2 firewood sound?'
[EX A]: No

[EX Q]: Context: 'Are you sure friend. ?' 'yeah sure friend I understand your situation🙂' 'wow. thank you so much friend. so kind of you Thanks for the help. '
Utterance: 'sorry friend wrongly press the reject button. Have a nice day friend.'
[EX A]: No

[EX Q]: Context: 'I could really use some extra firewood!' 'So could I. How about we split the firewood?' 'How about I take 2 firewood but you can have 2 waters? Water is pretty important and I have a little extra.'
Utterance: 'That sounds fair.'
[EX A]:
Yes