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: '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?'

A: Yes
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Q: Context: 'Thats what I wanted, but wait , I just remember that I have to stay a bit longer at the camp . why don't you let me have 3 on food, 2 on firewood and you van have all the water and ' 'ok, your being greedy but lets make the deal' 'hahahah not too greedy, but yes we can make a deal🙂'
Utterance: 'you gave me one on each, thats unfair man!'

A: Yes
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Q: Context: 'I have an idea. I could give you 3 firewood and you give me 3 water and 3 food. ' 'That would be great but I could find myself in need of some extra water. Don't want t get dehydrated from all the dancing! Could I trade you one of the firewood for 2 of the water?' 'I see. How about you get 2 firewood 1 water 1 food. And I get 1 firewod 2 water 2 food?'
Utterance: 'I think that sounds fair. So I would get 2 firewood, 1 water and 1 food. You could get 1 firewood, 2 water, 2 food. Is that correct?'

A:
Yes
****