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: 'Hi  I have an extra guest that will be camping with me and was wondering if you had an extra food package that you could spare?'
Utterance: 'I don't have much food, but you can take one package and I can take two? '

A: Yes
****
Q: Context: 'Would you be willing to give me 1 food, 2 firewood, and 2 water?' 'I could make that work 🙂 I'm sorry if I came off mean, I'm just trying to make sure I'll be ok. I don't camp often, so I'm not sure how to prepare.' 'I understand. What are you using the extra food for?'
Utterance: 'I brought some pre-packed snacks, and a few sandwiches. I'm hoping there are no hungry animals around. What about you?'

A: No
****
Q: Context: 'yeah we got a lot of things planned for them at the campgrounds. they're going to be pretty busy' 'So what is your main focus this trip?' 'one of my kids is on medication so we are going to need to pack a lot of water. so if could spare that it would be appreciated.'
Utterance: 'Well sadly I plan to go hiking a lot so I will need lots of water, but perhaps we can come to a reasonable agreement if I have to shorten my hikes.'

A:
Yes
****