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: 'I know we need extra food too and some firewood. Maybe a little water but we shouldn't need too much' 'It sounds like we are looking for the same things. I think there are some extra we can share. Do you have an idea about how it can be the most fair? ' 'how about I'll give you 2 food if you give me 2 firewood and 2 of the water?'
Utterance: 'I think that is a fair deal! '
[EX A]: Yes

[EX Q]: Context: 'Hi, 🙂 It's nice to meet you as well: I also hope we can work something out: Food is my excess trip priority, What is yours?' 'Mine is firewood with second being food.' 'I'm definitely willing to give up some food for some firewood: That seems like a place where we can come to an arrangement: Would you like to make an opening offer? '
Utterance: 'Sure!  I figure I can go with little water as we can get it from the stream and boil it.  So for water I would be willing to give you 2 packages.  Would that be fair?'
[EX A]: Yes

[EX Q]: Context: 'Hi;  I thought I was getting 2 firewoods, 2 waters and one food. Is that what we agreed upon?' 'You said you would give me 2 waters and 1 food for your 2 firewoods ' 'Yes, does that work for you.  I could give you 1 water and 2 foods as I really need the water for my hike.  I tend to overheat easily. '
Utterance: 'You are flipping it around. I can't give you 2 water and 2 firewood as that wouldn't really be fair '
[EX A]:
Yes