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.

[Q]: Context: 'i need food the most since there will be my kids and I. I can give up my firewood for food' 'Okay, so how about I get 1 food, and 3 firewood and 1 water, and you get 2 food, 0 firewood, and 2 water' 'sounds great'
Utterance: 'great! sounds good to me'
[A]: No

[Q]: Context: 'Okay, but water is important to me because I have health issues. So I drink more water for save my health.' 'Okay! You can have all the water. I want all the food.' 'yeah sure, I will share with you all the food. What is about firewood?'
Utterance: 'You can have two if I can have one if you're okay with that.'
[A]: Yes

[Q]: Context: 'I would like 2 firewood, and I don't care about anything else. I would give you 2 water and 3 food' 'I will give you 1 firewood for 3 waters and 3 foods. ' 'Nah I'll pass'
Utterance: 'Do you have another deal to offer? ☹️'
[A]:
No