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.

Q: Context: 'I think that can be negoiated then i tend to eat less on camping trips' 'Great!  So looks like all the water goes to you.  I will take all the food if that is ok and we can split the wood.  ' 'Well i would need one food and one wood'
Utterance: 'OK.  I think that will work out for me.  You get 3 water, 1 wood and 1 food.  I will take the rest.'

A: No
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Q: Context: 'Hi there! Are you excited about camping?'
Utterance: 'Hey! I sure am! The only thing is, I just learned that the canyon where I'm camping is going to be experiencing an unexpected heat wave over the next few days and I'm worried I might not be fully prepared. ☹️ What about you?'

A: No
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Q: 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. '

A:
Yes
****