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.
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Question: Context: 'Is that what you want or what you are offering?' 'That's what I'm offering to you, but I think it's a fair deal, so I'd accept it myself, too.' 'Fair enough.'
Utterance: 'If that sounds good, just tell me which bundle you want.'

Answer: No


Question: Context: 'I see.... Well we really would like the firewood too though. Could you reconsider it makes a big difference for us.' 'Sorry I will only consider a deal if I can get at least two fire wood.' 'Well if that is the case then I want 1 Firewood 3 waters and 2 Food then. '
Utterance: 'That is kind of excessive though.... 6 - 3 of an item share? '

Answer: Yes


Question: Context: 'I understand where you're coming from. I would really need the most water. ' 'I am willing to give you the most water if I am able to have the most food.' 'Well I need some food because what if I get lost as well? '
Utterance: 'I understand that, but walking away with the most food and the most water would essentially leave me for dead lol. Do you prefer water or food? '

Answer:
Yes