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 looking forward to striking a deal with you that makes both of us happy!' 'Sure I am waiting too!'
Utterance: 'So tell me, which is most important to you? What can't you live without?'

SOLUTION: No

PROBLEM: Context: 'Hello there.  That deal most definitely will not work for me. ' 'OK, If i take all 3 of the foods and 1 of the waters you can have the remaining packages ' 'I need to eat too, especially if I want to go on a long hike.  How about I take 2 foods, 2 waters, and 1 firewood? '
Utterance: 'I am sorry that will not work for me, how about i take 2 food, 1 water and 1 firewood and you can have the rest? That way we each get some of each'

SOLUTION: Yes

PROBLEM: Context: 'Yeah, it's very sad these days' 'Then I got here and noticed I didn't pack my cooking sterno and critters go into some of my food☹️Kinda puts a damper on the trip.' 'Oh, i see. How about you get 2 food 1 firewood and 1 water. I need the extra firewood to stay warm at night'
Utterance: 'Yeah, that should work. I brought plenty of water and the critters left that alone. You planning to go out on the trails at all?'

SOLUTION:
No