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.
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Question: Context: 'How about I take 2 packs of water while retain your initial request for food and firewood?' 'I cannot allow any water. As I mentioned we will be camping away from all bodies of water and cannot negotiate on that item. I need 3 water, or else I will need to cancel the trip. We might be able to negotiate on the food though.' 'I need to have at least a pack of water. How about 1 water, 3 firewood and 1 food?'
Utterance: 'Okay. I fear some of us may die of thirst, but I will give you 1 water. I can't agree to those terms though. I can give you 1 water 1 firewood and 2 food. That is my final offer though.'

Answer: Yes


Question: Context: 'That would make things better for me.  ' 'Can I ask you why you need so much water for one person? ' 'Hiking in the summer, I sweat a lot and I don't want to risk getting dehydrating and sick out in the woods.'
Utterance: 'Well this might work out, I will agree to take 2 food, 3 firewood and 1 water. I think we will be fine because we are not going hiking. We are going to sit around campfire and catch up on old times. Good deal for both of us if you agree. 🙂'

Answer: Yes


Question: Context: 'I feel that I am not getting a fair deal. ' 'Then what do you think is fair?' 'I think that I should get 2 firewood, 1 food and 2 water'
Utterance: 'I will let you have 2 firewood if you let me have 3 food, 2 water, and 1 firewood.'

Answer:
No