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: 'Well, I have two teenage boys who will be with me.  In normal circumstances they go through a lot of food.  While camping, hiking and kayaking I know we will need plenty to keep their energy level high to do everything.🙂' 'Well I will definitely need 2 packages of food and 2 of firewood for survival.' 'I am definitely ok with giving you two of the firewood!!  Why do you need 2 packages of food?'
Utterance: 'I have a very fast metabolism and a dog to take care of. Thanks for the firewood.'

SOLUTION: No

PROBLEM: Context: 'Interesting. Looks like we are in the same situation! 😮' 'I'd be willing to give you extra food if I could then get extra water and firewood. How about you Get 2 food, 1 water and 1 firewood?' 'That sounds almost fair. But I could possibly use 1 more firewood. What do you think?🙂🙂'
Utterance: 'Idk, you're already getting the extra food which would be important to me. I think my offer is very fair for both of us.'

SOLUTION: Yes

PROBLEM: Context: 
Utterance: 'Hi  - nice to meet you!  I hope we can work out a deal that is good for both of us.'

SOLUTION:
Yes

