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.
--------
Question: 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. '

Answer: Yes


Question: Context: 'What if I get 2 food packages and 1 water package....and you would get 1 food package and 2 waters?' 'I think we will need more extra food than that.  How about the reverse, I get 2 food and 1 water and you get 1 food and 2 water.' 'I could do that if I could then get 2 packages of wood as well because it's been bitterly cold this time of year at night in the Alleghenies.'
Utterance: 'That sounds fair.  So I would get 2 food, 1 water, and 1 firewood.'

Answer: Yes


Question: Context: 'I’m doing fine. How about you?' 'I'm doing well. I was hoping I could have the extra firewood because my group decided to camp for a few extra days and want to make sure we have enough' 'How many of you are on the camping grounds?'
Utterance: 'It's just my family. There are 6 of us total'

Answer:
No