TASK DEFINITION: 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.
PROBLEM: Context: 'Hi! How about I receive 3 food, 2 firewood, and 1 water?' 'I can't do that. It would leave me with no food at all. How about I take 2 food, and 1 firewood, and 1 water?' 'I really need more food than 1. I am worried about running out. I could take 2 food, and give you 1 food, 2 firewood, and 2 water.'
Utterance: 'That is a very generous offer, which I very much appreciate. But I am also worried that I could run out. What if I take 2 foods, give you 2 firewoods, and 1 water?  '

SOLUTION: Yes

PROBLEM: Context: 'How about this it think it will work out better for us and you snice you need fire wood too. You get 3 food and 2 firewood and and I get 3 water and 1 firewood. 🙂🙂' 'I really don't want to be without water, how about 2 water and 2 firewood for the 3 packages of food?' 'I just want to make sure I understand you I get 2 waters and 2 firewood and 0 food. '
Utterance: 'That's right. Since you would be getting food from your sister, while I am camping alone, you would be getting more food pretty soon. '

SOLUTION: No

PROBLEM: Context: 'you told me i not fair that why i told you are not fare,3 food for me  will give 3 firewood for me, give 2 water for me, other we can end the deal and both we can forget the bonus' 'ok' 'then what will do ? if you ok for 3 food for me , 3 firefor you, 2 water for me , for this deal we can go forward?'
Utterance: 'of course not. you just took all the priority items and you still want two water. I am going to make the last offer. you take two food and two water, I take one food, three wood and aone water. '

SOLUTION:
Yes