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: 
Utterance: 'hi there 🙂'
[EX A]: No

[EX Q]: Context: 'You get 2 food, 1 firewood and 1 water' 'I am okay with that deal. What is your opinion?' 'sounds good. I will go ahead and put it in on my end'
Utterance: 'Okay. I will give you 1 food, 2 water and 2 firewood'
[EX A]: No

[EX Q]: Context: 'I will have my two packages of food and only one package of firewood. I do not think I can make one package of firewood last for both of my food. ' 'So is your counter that you get 2 packages of food, 0 of water, and 2 of firewood?' 'Yes, I would be happy with two food and two firewood. That would leave you with one food and one firewood as well as all of the water.'
Utterance: 'Ok that sounds fair I agree to that 🙂'
[EX A]:
Yes