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: 'Hello, I'm excited for our camping trip!' 'Hey buddy, yes I'm so pumped for it.' 'Okay so I'm planning this super cool backpacking expedition up the waterfall but I'm going to need all the additional water and food for everyone.'
Utterance: 'All of the additional water and food? That doesn't seem very fair. ☹️'
[A]: Yes

[Q]: Context: 'I am so excited to go camping! I am planning a nice long walk in the woods to decompress from the hectic days of working.' 'I am too. I've been thinking of this since COVID. I hear we have some materials to share between the two of us. What are you thinking? For me, I am from the South so I get cold easily 🙂 so firewood is my main priority.'
Utterance: 'Perfect! I'm a northerner, so the firewood is all yours! I'll need lot's of water to keep hydrated after the hike, and I'll probably be pretty hungry too.'
[A]: No

[Q]: Context: 'I am sooooo excited too! I can't wait to sit by the fire! 🙂' 'Me too!!!! That is what I am most excited about. I was actually hoping you might have some firewood to spare?' 'Gosh, that's a bg favor because I need the firewood. I will give you all of the firewood if you will give me all of the food. How's that?'
Utterance: 'Fair enough! Thank you! I would really appreciate any extra water that you have too?'
[A]:
Yes