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: 'We can definitely work something out. I'll be sure it'll benefit you more than me. 🙂' 'Oh, well that's really nice of you. What do you propose?' 'You'll get 3 food and 2 water, and I'll take 3 firewood and 1 water. 🙂'
Utterance: 'Hmm, I think that could definitely work! Appreciate it 🙂'

SOLUTION: Yes

PROBLEM: Context: 'I'll only give you all the firewood if you give me everything else. I know it's your top priority😮' 'How about I take all the wood, give you all the food, you can have 2 waters and I can have one. Having a little extra water will help me with all the hiking we will be doing, plus since i wont be eating much I want to stay hydrated. Will that work for you>>🙂' 'cringe ☹️. Ill take one firewood and two of both water and food '
Utterance: 'Sorry - I just cant do that. I want to come to an agreement but dont feel that its fair. '

SOLUTION: Yes

PROBLEM: Context: 'ha no prob on the wood, its out there in nature so i can do with less of it hows 3 water, 1 food, 0 wood sound' 'I'll need at least one water dude. I don't have any beer. 🙂' 'were getting closer - id do 2 water, 2 food, 1 wood'
Utterance: 'I don't know. You are geting more items. That's greed bro :-)'

SOLUTION:
Yes