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: 'Water was my high priority and food was your's, so I think we already split the difference there. ' 'Okay, so how do you propose splitting the firewood?' 'Can we split a bundle, in the real world that would be cool.  '
Utterance: 'I wish we could. I would be down for that. 🙂 That seems the most fair to me. How about you enter the trade deal on your end?'

SOLUTION: Yes

PROBLEM: Context: 'I understand your preferences. If I take all of the water, 1 firewood, and 2 food your family will still have the opportunity to have a good camping trip and I can learn to survive on this trip. Please consider my request again.☹️' 'Ok - you're not being reasonable at all.  If you're so incompetent at going camping, maybe you should stay home and I can take all the supplies. How's that for an excellent offer?  All for me and 0 for you.' 'I think it would be good to come to a compromise. If I take all of the water and have the 2 foods, you can take all of the firewood as you originally proposed. Yet, I will have a tough time learning how to survive on a camping trip.😡'
Utterance: 'Again, that's not a fair compromise....You get all of what we both we want and more of another item.  Let me state it to you clearly so you can understand.  I WILL NOT ACCEPT THAT OFFER.  There is no chance you are getting all the water now that I think about it.  I will offer I get 1 water, 2 firewood, and 2 food.  If you can't come up with a reasonable offer, I will just walk away and we both get nothing.  I will survive because I will have skills.'

SOLUTION: Yes

PROBLEM: Context: 'Cool! 🙂  It's a good number, we are planning on 10, but you never know on these.  What I do know is this group loves to eat and hike, plus it might get a little chilly.' 'yeah, i understand that. we are all apart of a weigh watchers group ao we' '😮 Been there and done that.  It's great when you can start to see the change in their self esteem!'
Utterance: 'yes, for sure starting to see results, id be more than happy if i could get two or three waters and at least one or two firewood '

SOLUTION:
No