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 am working hard around the camp and getting hungry!' 'You came here to work? I’ve been taking it easy. ' 'LOL, I mean setting up the tent and clearing the area for a campfire. I'll take a break now.'
Utterance: 'Sounds good.  I suggest you make a fire and relax. '
No

Context: 'Woah... You can take more food as well' 'Thank you dear! :D I really appreciate that. Are you okay with how everything is divided up then?' 'Sure'
Utterance: 'Sounds great. So I have 1 firewood, 2 waters, 2 foods. And you have 2 firewood, 1 water, and 1 food. Let me know if that's alright'
No

Context: 'Okay, maybe we can split the water and then divy up the rest. What else are you interested in?' 'I was hoping for a decent amount of food, just in case my new recipes don't work out, lol. 🙂' 'Haha, makes sense. I'm also interested in food. What if I take 2 waters and 1 food, and you take 1 water and 2 food?'
Utterance: 'I would be okay with that if I could also have all of the firewood. It seems fair since you will be getting the most water. Would that work for you?'

Yes