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: 'no i need firewood to always keep myself warm.' 'So do I, I have health issues. I can give you one firewood, if I get all the food. ' 'why can't i get 2 firewoods?.......i'm an ulcer patient i need more than enough food to keep fit''
Utterance: 'It will be a strain, but I can give you 2 firewood if I get all the food and two water.'

Output: No

Input: Consider Input: Context: 'Hello. How are you?' 'I am good. I am pretty excited for the trip this weekend. what about you?' 'Very excited. It will be fun.'
Utterance: 'Yes, Hopefully the weather holds up. So I was thinking, i am bringning my two kids along with me, and they will need food, so I was thinking i could take the three foods, and either one of the firewood or water, up to you.'

Output: No

Input: Consider Input: Context: 'My favorite thing to do is sing songs and tell stories around a campfire. Consequently, I was really hoping to get some additional packages of firewood. 🙂' 'I do love sing alongs around the campfire. I usually go hiking and it requires a lot of energy and fuel. Maybe I can get additional food packages?' 'You'll definitely need some additional calories if you want to do extra hiking. I will give you all the additional food if you give me all the additional firewood. '
Utterance: 'Sounds like a deal, maybe split the water packages evenly. Can't be dehyradated while camping 🙂'
Output: Yes