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: 'What do you need it for?' 'I would like some extra food in case I get hungry.' 'Okay that sounds ok, I can do without the food. I also need two packages of water because it will be very hot out.'
Utterance: 'I can give you 2 packages of water.  I think there is plenty of water, so I do not need extra water.🙂'

Output: No


Input: Consider Input: Context: 'Hello. How are you?'
Utterance: 'I am good. I am pretty excited for the trip this weekend. what about you?'

Output: No


Input: Consider Input: Context: 'Same! I try to go every other weekend.' 'Oh cool. What supplies do you prefer to take the most of?' 'I do a lot of hiking mostly, love to take scenic photos. I usually carry food and water supplies?'
Utterance: 'Me too. I am not good at hunting or fishing. So I generally try to take extra food'


Output: No