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.
Input: Context: 'I would really appreciate if I am able to take 2 of the food packages since I am a vegan and its hard to find options in the woods and if i can have 2 or 3 of the waters because i have a baby coming with me and i need it for his formula! ' 'I think I can help with that, but in exchange, can I have 3 firewood bundles? I hate to take from the forest and risk damaging the natural wildlife habitat.' 'yes of course!'
Utterance: 'great!'

No