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: 'I have a medium amount of water so I would like some more. I wish we had lots of supplies to split up evenly but I'm sure we can work it out🙂' 'I agree! We can figure out working out a deal! What if I gave you 2 food and 2 waters and you gave me your wood and one of food/water? If that doesn't work for you we can also figure something else out.' 'I think that sounds reasonable. Of course, I could counter with I take 2 food, 2 waters and 1 firewood. What do you think of that?'
Utterance: 'That is also good. This is hard to work out since it's uneven haha. What about if I give you all my food, you give me all your firewood, and then I can give you 2 waters? I think that'd be more fair for you. '

A: Yes
****
Q: Context: 'Hello, can we make a deal?'
Utterance: 'Of course! Are you going camping too?'

A: No
****
Q: Context: 'I am walking away, completely unfair' 'You haven't offered anything and walking away means you get nothing so that doesn't seem like an option' 'You can have ALL the water, and 1 firewood'
Utterance: 'If you want two firewoods, i will need some of the food.  My family maybe cold, we can't be cold and hungry.  I need at least 1 food '

A:
Yes
****