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.

Input: Consider Input: Context: 'I don't need the water as much. How about I get 2 firewood and you get 2 water?' 'I would prefer all the water. You can have all of the firewood.' 'That sounds good to me. What about the food?'
Utterance: 'I would like 2 food, but you may have one. I wouldn't want you to be too hungry!'

Output: Yes

Input: Consider Input: Context: 'I could use a little to cook with, But food is my main concern. Is it hot where you will be? ' 'Ya so I could use a lot of water! Would you be willing for me to take one food two water and two firewood? ' 'Since we will have so much food to cook we could probably use the extra firewood too,would you be ok with me taking 2 food and 1 water and 2 firewood?🙂'
Utterance: 'No I'm giving you two of your top items I think it's only fair I get more items. '

Output: Yes

Input: Consider Input: Context: 'Are you sure you won't get hungry? I am open to giving you the two waters, but I want to make sure its the best deal for you. I would want 2 firewoods and 2 foods in exchange.' 'brother k , bro 2 water and 2 wire wood 1 firewood can you given?' 'I think that that is acceptable to me. I want to make sure we both understand: I get 1 Water, 2 Firewood, 2 Food Packages. You get 2 Waters, 1 Firewood, 1 Food Package. I will have to ration my water, but I think the extra comfort is worth it. Does this work for you? '
Utterance: 'bro its not profitable ratiobro gave 3 water 1 firewood, remaning you can take'
Output: Yes