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 would like to do some hiking before getting back to the campfire. I especially like hiking when the weather is cooler. It works up my appetite for those hot dogs and marshmallows, which are one of the best parts of camping for sure! 🙂' 'How about I take 3 firewood, 2 food, and 0 water?' 'I like that deal, but I feel like you might need at least one water? ☹️ What if instead you take 3 firewood, 2 food and 1 water? And I could take 0 firewood, 1 food and 2 water? I'm okay with fewer items. I don't need much to get by, but I sure need 2 of the 3 waters.'
Utterance: 'Are you sure that you want to give me that much? 😮 If you're sure, that would work for me.'
[A]: Yes

[Q]: Context: 'hi there' 'Hello. How are you?' 'not too bad, looking forward to a good camping trip 🙂'
Utterance: 'Yes! This camping trip is going to be great! I hope to make it very memorable.'
[A]: No

[Q]: Context: 'All the food is too much, I would need at least one package of the food for my group. I was thinking you could have 2 of the food packages and I have 1, then I get all the water and the majority of the firewood. That leaves you with 2 of the high priority food packages and a package of firewood to cook the food.' 'That seems quite unfair. I really would like my camping trip to be enjoyable.' 'I understand. What part of the deal is unfair to you? You get the majority of the highest priority item (food) and I get the majority of the lower priority items (water and firewood).'
Utterance: '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. '
[A]:
No