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 would like to have more water then what I got because I drink a lot' 'Hi, nice getting to interact with you. It is fine if I give one of it, as that is something that I need the most as well.' 'I can give you 2 packages of food or firewood instead'
Utterance: 'Hmm. I'm not able to compromise on this, I'm fine with 1 package of firewood and food each.'

A: Yes
****
Q: Context: 'so if i were to  give you water what would i get ?' 'You'd be getting 1 water, 2 firewood, and 1 food' 'how much food are you willing to offer for water'
Utterance: 'We can go back to my original offer which was honestly more generous.. I get 2 Water, 1 Firewood, 1 food.. you get 1 water, 2 firewood, 2 food.. its honestly a better deal for you 🙂'

A: Yes
****
Q: Context: 'Hi there! How are you?' 'Hello good morning I'm well thank you.' 'Let's talk about what we need. First, I don't eat meat, so I really feel like I'd need a little extra food, as I couldn't hunt or forage for food at all. I feel like I could survive without a ton of water, but would need water, as I hike a lot and cant trust any sources'
Utterance: 'I've also planned my trip to include a lot of hiking and so I have a high priority for extra water, as like you've said you need to stay hydrated on your hike and you can't trust any source. How can we divide up the water as that seems to be the number one priority for us both.'

A:
Yes
****