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: 'Hello, I'm in a strong need for food and water. Please let me have a few packages of food and water. I'd gladly trade all my firewood for it.'
Utterance: 'Hello. Wow! That does not sound good. My sister just called and let me know she will be coming tonight. She is bringing food so i have plenty to share. 🙂'

SOLUTION: No

PROBLEM: Context: 'That will not work for me at all. ' 'I see. Then how does 2 Firewood, 1 food and 1 water for me sound? You'll be getting 1, Wood 2 Foods and 1 Water' 'Your calculations are incorrect. There are 3 firewood, 3 food, and 3 water. You are missing a water. I will return to my original offer since you need firewood the most and I need food the most. I take all the food, you take all the wood. And then you can take 1 water as you just suggested. '
Utterance: 'That will work fine with me. Please enjoy your food and two waters.'

SOLUTION: No

PROBLEM: Context: 'You can find more wood in the forest but I'm going somewhere where there's not a loot of trees ☹️' 'That makes sense. What if you took 2 firewood in exchange for 1 additional food?' 'you can have 3 food'
Utterance: 'Alright🙂 From what I understand, that means that you would take 3 firewood, and I would take 3 water and 3 food. Is this your understanding as well?'

SOLUTION:
No