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 water? do you need? I can offer 2 of these for 1 pack of food' 'I have plenty of water right now, but need at least 1 pack of food for myself.' 'OK. Do I get the water then? You can at least take a pack'
Utterance: 'Yes, that works for me. 🙂'

Answer: No


Question: Context: 'Hi!  The weather is going to be a lot colder than I anticipated, so I need extra firewood.  Would you be willing to give some to me?' 'Sure, but I need 2 packs of firewood and 2 packs of food and water'
Utterance: 'That doesn't really sound fair to me ☹️'

Answer: Yes


Question: Context: 'why can't i get 2 firewoods?.......i'm an ulcer patient i need more than enough food to keep fit'' 'It will be a strain, but I can give you 2 firewood if I get all the food and two water.' 'No that food is very much important to me......i'll get 2 food,2 firewood and 1 water'
Utterance: 'With little firewood, I need the food since I can't cook fish.  How about you get 2 firewood, one food, and 1 water?'

Answer:
Yes