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.

Ex Input:
Context: 'I was thinking about 2 units of firewood and 1 unit of food and one unit of water, what are you going to be needing this for?' 'I can do that. I am going camping in the fall with my family so we need a lot of food. We're camping by the lake so if you want I can give you an extra unit of water.' 'sure thats sounds fair, so that would leave you with two units of food one unit of firewood and one unit of water then?'
Utterance: 'That sounds fair to me. Have fun with the kiddo!'

Ex Output:
Yes


Ex Input:
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.'

Ex Output:
Yes


Ex Input:
Context: 'I like watching the camp fire all night. What is your reason for needing more firewood?' 'That does sound very nice. I would like more in order to stay warm, and for cooking some delicious food.' 'I see. So what you want is  2 more fire wood, and 1 water? Is that what i'm to understand.'
Utterance: 'Since you would also like firewood, I propose 2 firewood, 2 water to me, and you get 1 wood, 1 water, and all the food to make up for it.'

Ex Output:

Yes