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.

[Q]: Context: 'I have a medical condition that causes my veins to close up when I get too cold. I will thus need the 3 firewood.' '☹️Oh, that sounds awful. Are you sure you need all three packages of firewood?'
Utterance: 'I might be able to get by with just two... I'm on a diet though, so I don't need as much food.'
[A]: No


[Q]: Context: 'Hi'' 'Hello I would like to take 3 extra food packages and 3 extra water package and 1 extra firewood packages because we had some unexpected guest join us on our camping trip.🙂' 'I need 3 food packages as it is required to feed children who visited unexpectedly. Instead you can take water and firewood'
Utterance: 'No that doesn't work for me. I also have children with me. 4 children in total.  how about i take 2 food packages and 2 water packages and you take 1 food 1 water and 3 firewood packages.'
[A]: No


[Q]: Context: 'That's awesome! Since we have the basics, would you be willing to swap 3 packages of food for 3 packages of water?' 'We will need two food so we can fill their bellies, but I will be glad to offer you all the firewood since I can use my axe and get wood for us.' 'Absolutely understand. How does this deal sound: you will get 2 food, I will get 1. You will get 3 water, I will get 0. You will get 0 firewood, I will get 3.'
Utterance: 'That is a very fair deal. I am glad we could work this out.'
[A]:
Yes