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: 'so if i were to  give you water what would i get ?' 'You'd be getting 1 water, 2 firewood, and 1 food' 'how much food are you willing to offer for water'
Utterance: 'We can go back to my original offer which was honestly more generous.. I get 2 Water, 1 Firewood, 1 food.. you get 1 water, 2 firewood, 2 food.. its honestly a better deal for you 🙂'
[EX A]: Yes

[EX Q]: Context: 'It's been so cold these last few days, I'm worried that I didn't bring enough wood for the next few nights.'
Utterance: 'That is unfortunate. How about I give you are my firewood for all your food?'
[EX A]: No

[EX Q]: Context: 'I could also use the extra food, so can we resolve it amicably?  Coin flip maybe?' 'That's a good idea.  I'll trust you to do the coin flip.  ' 'Sure.  🙂  I'll grab a coin.'
Utterance: 'Calling tails.  '
[EX A]:
No