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: 'Zero water is not going to work 😮. I am willing to switch water and firewood amounts so that I get 2 firewood and 1 water and you get 2 water and 1 firewood. ' 'Alright. But than I will need at least 1 food than. So it would be 2 water for me 1 for you, 1 food for me 2 for you and 1 firewood for me and 2 for you. 🙂' 'I think that sounds ok, I will make that deal with you whenever we can go through with it. 🙂'
Utterance: 'Smashing🙂 Sounds good with me. Happy to get it all sorted out. cheers'
[A]: No

[Q]: Context: 'I think that can be negoiated then i tend to eat less on camping trips' 'Great! So looks like all the water goes to you. I will take all the food if that is ok and we can split the wood. ' 'Well i would need one food and one wood'
Utterance: 'OK. I think that will work out for me. You get 3 water, 1 wood and 1 food. I will take the rest.'
[A]: No

[Q]: Context: 'I can give you more food if you like but I really need the water' 'It seems we both need the water so If you want 2 water, I would need all the food and firewood as well.' 'How about this I give you 1 package of water, 2 packages of food, and 3 packages of Firewood. You get the majority of my items'
Utterance: 'I guess that could work and seems pretty fair for all.'
[A]:
Yes