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 Input:
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.'

Ex Output:
Yes


Ex Input:
Context: 'I would love to have the Firewood the most. ' 'Unfortunately I need firewood the most too. How about I take 2 firewood, 2 food, and 1 water?' 'I feel that I am not getting a fair deal. '
Utterance: 'Then what do you think is fair?'

Ex Output:
Yes


Ex Input:
Context: 'Actually, I'd like to keep some water as well in case it gets so cold that the lakes and other water sources freeze.' 'Well, I need as much food as possible. You seem to want firewood. How about you suggest something.' 'That's a good idea.Let me think. How about 3 Firewood, 1 Food and 2 waters for me.'
Utterance: 'That will not work for me at all. '

Ex Output:

Yes