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: 
Utterance: 'Hi  - nice to meet you!  I hope we can work out a deal that is good for both of us.'
Yes

Context: 'are you hiking alone?' 'no i will have my husband and my dog with me' 'oh nice well how about you give me 3 water and I give you 3 food and we figure out the wood make a suggestion'
Utterance: 'ill take one you get twoa/'
No

Context: 'Hello! Which item do you need the most?' 'I would love to have the Firewood the most. ' 'Unfortunately I need firewood the most too. How about I take 2 firewood, 2 food, and 1 water?'
Utterance: 'I feel that I am not getting a fair deal. '

Yes