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.

Context: 'I don't need the water as much.  How about I get 2 firewood and you get 2 water?' 'I would prefer all the water. You can have all of the firewood.' 'That sounds good to me.  What about the food?'
Utterance: 'I would like 2 food, but you may have one. I wouldn't want you to be too hungry!'
Yes

Context: 'Yes, I get cold easy. Thanks a lot!' 'sure, i have a lot of people coming thats why i need food' 'No problems with that. I am glad we could make a deal. To summarize, you will have 3 of food and 1 of firewood while I will have 3 of water and 2 of Firewood.'
Utterance: 'yes🙂'
No

Context: 'can i have 2 foods too' 'If I can have all the firewood...' 'i am giving you one firewood'
Utterance: 'That doesn't work for me. I propose you get 2 water and one firewood and 2 food.'

Yes