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.

Input: Consider Input: Context: 'hello!' 'Hi how are you today? '
Utterance: 'am fine and you?'

Output: No


Input: Consider Input: Context: 'I could also use the extra food, so can we resolve it amicably?  Coin flip maybe?' 'That's a good idea.  I'll trust you to do the coin flip.  ' 'Sure.  🙂  I'll grab a coin.'
Utterance: 'Calling tails.  '

Output: No


Input: Consider 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 ☹️'


Output: Yes