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: 'It's been so cold these last few days, I'm worried that I didn't bring enough wood for the next few nights.' 'That is unfortunate. How about I give you are my firewood for all your food?'
Utterance: 'That is a very generous offer but I think I need to keep some food to be safe. Do you need any water?'
[EX A]: Yes

[EX Q]: Context: 'I'll need water. My kids take medications and need to stay hydrated.' 'Absolutely. My second most needed item is food so that works out well.' 'Well I am happy to give you all my food in exchange for all your water.'
Utterance: 'We can do that! How do you want to split up the firewood?'
[EX A]: No

[EX Q]: Context: 'you can make water by boiling water with all that extra firewood you got' 'you said I could have some firewood' 'Let me take 2 firewood, 2 water and you take the rest. You will have more than me overall'
Utterance: 'ok'
[EX A]:
No