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: 'Hello.' 'Hello there, fellow camper! 🙂' 'I would like 3 packages of food, 2 packages of firewood, and 1 package of water.'
Utterance: 'That's not going to work for me at all, I would like 3 packages of water, 2 packages of food, and 1 package of firewood'
Yes

Context: 'Are you bringing guest?' 'I am a campaign partner' 'Oh. What does that mean?'
Utterance: 'No I am the only person who come with you'
No

Context: 'Then i understand, i have kidney issues but i would rather go without then take away from a family' 'If you need water for a medical issue the of course you can have two waters.' 'You are being very kind then, im elderly so trying to make fresh water by boiling it from getting it from a river was concerning to me. How about you take all three of the food for your kiddo's'
Utterance: 'That sounds fair. The kids can bathe in the stream. We are good with 2 food packs.'
Yes