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: 'Hello! how are you doing?' 'Hello, I would like to keep the 3 extra packages of firewood an 2 extra packages of water.  You can have all 3 packages of water and 1 package of food.' 'That's just too big of an ask. How about I get 3 firewood and 1 water and you can have the rest'
Utterance: 'I really need the extra firewood.  I hiked 5 miles o this camping spot and I need the extra firewood to stay warm and to keep the wild animals away at night.'

Ex Output:
No


Ex Input:
Context: 
Utterance: 'hi there 🙂'

Ex Output:
No


Ex Input:
Context: 'how much firewood do you need' 'I would like 2' 'I will  be happy to let you have 3 packs of food , but I need 2 packs of firewood'
Utterance: 'I am also letting you have all 3 packs of water. I think we need to consider how to split the firewood in a fair manner.'

Ex Output:

Yes