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: 'I would like to do some hiking before getting back to the campfire. I especially like hiking when the weather is cooler. It works up my appetite for those hot dogs and marshmallows, which are one of the best parts of camping for sure! 🙂' 'How about I take 3 firewood, 2 food, and 0 water?' 'I like that deal, but I feel like you might need at least one water? ☹️ What if instead you take 3 firewood, 2 food and 1 water? And I could take 0 firewood, 1 food and 2 water? I'm okay with fewer items. I don't need much to get by, but I sure need 2 of the 3 waters.'
Utterance: 'Are you sure that you want to give me that much? 😮  If you're sure, that would work for me.'
Yes

Context: 'Incorrect. ' 'In order to make it work I need at least 3 water and 2 food. Or I could do 3 firewood and 2 food and 0 water. I don't see any other way around it' 'It has to be fair. Right now I don't think you are being fair. The last offer I gave was great for you. You all all of the food and 2 water.You wanted 3 food in your last offer so thats a great offer I suggested.'
Utterance: 'I will agree to 2 water and 3 food for me and the rest for you.'
No

Context: 'Hello, I'm in a strong need for food and water. Please let me have a few packages of food and water. I'd gladly trade all my firewood for it.'
Utterance: 'Hello. Wow! That does not sound good. My sister just called and let me know she will be coming tonight. She is bringing food so i have plenty to share. 🙂'

No