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: 
Utterance: 'Hello I hope we can negotiate so that we are both satisfied. Do you think it's OK?🙂'

Ex Output:
Yes


Ex Input:
Context: 'You have food and water, this is just extra supplies' 'I know but with my condition i may not make it, especially without more water.😮' 'you can make water by boiling water with all that extra firewood you got'
Utterance: 'you said I could have some firewood'

Ex Output:
No


Ex Input:
Context: 'Oh no! I hope you are okay! ' 'Yeah, I'm okay now.  It's just that I need to have a lot of food around to be able to manage it properly.  Like on this camping trip.' 'I totally understand! I am in need of food too, but it sounds like you really need it so I am hapy to give you all of the food if I can have all of the firewood?'
Utterance: 'What is your need for water?  I could use some of that, too.'

Ex Output:

No