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 plenty of firewood.  I need two pieces of food though for my hiking.  ' 'one piece wouldn't be enough? i will give all the water' 'Nope, I need two.  I can give you all of the firewood. '
Utterance: 'all the firewood and one food then, not ideal but i can work with that.'
[A]: Yes


[Q]: Context: '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' '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'
Utterance: 'you also not fare,you also not  ready to give a give offer, give me 3 food , remaining one firewood one water 3 1 1'
[A]: Yes


[Q]: Context: 'Hi, I'm hoping we can come to a nice deal. 🙂 I'm most interested in firewood, because it always helps to have extra if your fire goes out.' 'That makes sense. I'm also interested in firewood, but have a great need for water due to the current weather. '
Utterance: 'That makes sense. How about we start out with I get 3 firewood, and you get 3 waters?'
[A]:
No