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: '3 firewood, 1 water, 0 food' 'so I'll get 2 water, 3 food and 0 firewood?' 'Incorrect. '
Utterance: 'In order to make it work I need at least 3 water and 2 food. Or I could do 3 firewood and 2 food and 0 water. I don't see any other way around it'

A: Yes
****
Q: Context: 'Hello! ' 'Hello there! How are you?'
Utterance: 'I'm doing well! Just want to have some open communication on the packages for our camping trip! I'm very excited for it!'

A: No
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Q: Context: 
Utterance: 'Hello, how is your camping trip going?'

A:
No
****