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: 'What about the food? How much food do you need for camping?' '2 food would be all that I need 🙂' 'I would need 2 food if you keep all the firewood. It would make it easier on me cooking wise since I'll have to look for wood'
Utterance: 'OK, that is fair.  So I would get 3 firewood, 1 water and 1 food and you would get 0 firewood, 2 food and 2 water.'
[A]: Yes


[Q]: Context: 'Hi there!' 'Im really low in food, is it ok if I get 3 Food, 1 water & 1 firewood? What do you think?' 'With the cool weather in degrees lower than expected, my family of 7 are consuming firewood faster than expected. Thus, I would like all the firewood in exchange for the food'
Utterance: 'Oh ok, that will be great. How about the water? Is 2 for me and 1 for you ok?'
[A]: No


[Q]: Context: 'I can give you more food if you like but I really need the water' 'It seems we both need the water so If you want 2 water, I would need all the food and firewood as well.' 'How about this I give you 1 package of  water, 2 packages of food, and 3 packages of Firewood.  You get the majority of my items'
Utterance: 'I guess that could work and seems pretty fair for all.'
[A]:
Yes