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.

Context: 'How about I do: 2 firewood, 2 food and 1 water?' 'Well, what would it take for you to give up extra wood? ' '3 food and 2 water'
Utterance: 'ok let's go with that. you take 3 food, 2 water and 1 firewood, let's make it happen that way and move on with camping ! '
No

Context: 'Oh, that won't really work for me.  I was hoping to get extra food and water for this trip since I need water to take medication and would love the food to plan a special meal.  I'd like say, 2 food, 3 water and 1 firewood' 'I could give you 2 food, if I could have 3 firewood and 2 water' 'Hmm, how about I take 2 food and 2 water and you can have all the firewood?'
Utterance: 'This is fair, but I do not have any use for much firewood. I could give you 2 firewood, 2 water and 1 food'
Yes

Context: 'That's just too big of an ask. How about I get 3 firewood and 1 water and you can have the rest' 'I really need the extra firewood.  I hiked 5 miles o this camping spot and I need the extra firewood to stay warm and to keep the wild animals away at night.' 'I really need some of the firewood too. I am expecting a big group of people to attend, and I can really use it. it gets really cold at night where we camp. What do you suggest is a more fair deal to the both of us?'
Utterance: 'I will give you one extra package of firewood. You can have all 3 packages of food 1 package of water for your group of friends. Does that sound good?🙂'

Yes