instruction:
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.
question:
Context: 
Utterance: 'Hey there how are you?'
answer:
No


question:
Context: 'i am an avid water drinker. i can afford to give you 2 water for three firewood though' 'I have alot of children, and those little rascals can chug water like there is no tomorrow, will you allow me to get the 3 waters and you can have 2 firewood and and 3 foods, what do you think?' 'i need the firewood because i tend to catch a cold easily and also scared of the dark. i can give you 2 water and 2 food for 3 firewood and i food'
Utterance: 'will you allow me to get 3 waters and you can have the 3 firewood and 2 foods? 🙂'
answer:
No


question:
Context: 'Okay then shall I take 2 packages of food and all the packages of water?' 'Yes, and I'll get 1 package of food and all of the firewood.' 'Okay I think this might be a good deal. '
Utterance: 'Actually, I've just thought about it and I'd also like one package of water. I think it'd be fair being that you're getting 2 packages of food.'
answer:

Yes