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.

Ex Input:
Context: 'I have a medical condition that causes my veins to close up when I get too cold. I will thus need the 3 firewood.' '☹️Oh, that sounds awful. Are you sure you need all three packages of firewood?'
Utterance: 'I might be able to get by with just two... I'm on a diet though, so I don't need as much food.'

Ex Output:
No


Ex Input:
Context: 'Hi, What is decision about packages?' 'I was thinking I will take 2 food, 1 water, 2 firewood'
Utterance: 'I would like to share 1 food, 1 water and 2 firewood with you. Can you accept the deal?'

Ex Output:
No


Ex Input:
Context: 'With little firewood, I need the food since I can't cook fish.  How about you get 2 firewood, one food, and 1 water?' 'how about i get 2food because it is very important to my health' 'Okay, how about you get 2 firewood, 2 food, and I get 1 firewood and 1 food and all the water?'
Utterance: '☹️ no i also need water,i get dehydrated easily'

Ex Output:

Yes