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.

Ex Input:
Context: 'no then u have to give 3 food for me' 'I can have two food then and one wood and you can have the rest of the items' 'bro make it 3 food for me, u can take 3 fire wood give me to water'
Utterance: 'you are not being fair, bare in mind we have same priority, so if you take all the food you have to give me the wood and water, or you can take all the wood and water and give me the food'

Ex Output:
Yes

Ex Input:
Context: 'Hi, 🙂 It's nice to meet you as well: I also hope we can work something out: Food is my excess trip priority, What is yours?' 'Mine is firewood with second being food.' 'I'm definitely willing to give up some food for some firewood: That seems like a place where we can come to an arrangement: Would you like to make an opening offer? '
Utterance: 'Sure! I figure I can go with little water as we can get it from the stream and boil it. So for water I would be willing to give you 2 packages. Would that be fair?'

Ex Output:
Yes

Ex Input:
Context: 'Hello I need a lot of water to survive'
Utterance: 'I have a lot of water around me I can use. So I can give you a lot of extra.'

Ex Output:
No