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: 'Hi, ' 'Hello. What sort of supplies are you looking for?' 'Well, I really dislike camping  :( and am looking to make the trip as comforting as possible.  I would like to gather 2 food, 2 firewood and 2 water please.  '
Utterance: 'I need a lot of food and I get cold easily. What is your top priority?'
[EX A]: No

[EX Q]: Context: 'It is even worse here and I am not feeling well' 'I am just going to walk away from the deal,  my family can't freeze' 'You can take 1 firewood then'
Utterance: 'C-ya, thanks anyways'
[EX A]: No

[EX Q]: Context: 'we both have the same high value priority. what is number 2 for you? thanks' '🙂 Food' 'me 2 lol, what if you got 2 of the water and me 1 but then i could do 2 of the food and firewood and things would kind of even out with that arrangement.'
Utterance: 'Yes, that would be fair. How much of Firewood would you need?'
[EX A]:
Yes