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 need Food, what is yours?' 'I kinda need water because I get dry mouth very often.  so without water it will make it hard to achieve getting other items in the wilderness.' 'Ok thats nice, I need food more because I didn't bring much and that a problem,  What do you think if I give you 2 wood and you give me 2 food?'
Utterance: '🙂 Well let me counter it, more beneficial to both of us, you will get 1 water, 2 food and 2 firewood as I can easily find firewood in the forest.  The water due to my dry mouth illness, I need the most ☹️'

Ex Output:
Yes


Ex Input:
Context: 'I see.... Well we really would like the firewood too though. Could you reconsider it makes a big difference for us.' 'Sorry I will only consider a deal if I can get at least two fire wood.' 'Well if that is the case then I want 1 Firewood 3 waters and 2 Food then. '
Utterance: 'That is kind of excessive though.... 6 - 3 of an item share? '

Ex Output:
Yes


Ex Input:
Context: 
Utterance: 'Hello hood to see a fellow camper.  How are you doing today?🙂'

Ex Output:

No