TASK DEFINITION: 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.
PROBLEM: Context: 'I would do 3 firewood, 2 water and 2 food.' 'I can't do that. Truth is I need the firewood and I was hoping you didn't need it. I propose I keep 1 firewood, 3 waters and 2 food and you take the rest?' 'I would do this instead: 3 firewood, 1 water and 2 food.'
Utterance: 'That's not going to be a fair offer, you'll need to do better than that or I don't think we can come to an agreement'

SOLUTION: Yes

PROBLEM: Context: 'What do you need it for?' 'I would like some extra food in case I get hungry.' 'Okay that sounds ok, I can do without the food. I also need two packages of water because it will be very hot out.'
Utterance: 'I can give you 2 packages of water.  I think there is plenty of water, so I do not need extra water.🙂'

SOLUTION: No

PROBLEM: Context: 'Hello there 🙂' 'Hello, I hope we can work together on an offer that benefits both of us. Do you think it's OK?🙂'
Utterance: 'Yes definitely!  I am pretty easy to work with and would like a deal that will help us both out as much as possible.'

SOLUTION:
Yes