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: 'Okay, great! What do you need the most?' 'I am looking for food, me and the kiddos need to eat many snacks for energy while exploring hiking trails. What about?' 'Okay, that makes sense. I really need water. I am willing to trade you all 3 of the food if you will give me all of the water. What do you think?'
Utterance: 'I think that sounds okay but I need at least one water please?'

Yes