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: 'Hi there, how are you doing?' 'I am great. Excited to go camping. How much food do you need?' 'I could use some extra food, I'll be hosting a get-together at my campsite later and will need some to entertain the guests. I'd like 2.'
Utterance: 'That is fine. I can go fishing to get some extra food but I would still like one. Can I take two packages of firewood so I can cook them? '

A: No
****
Q: Context: 'There could be.  However, I think that if we are both reasonable, we should be able to come to an agreement.' 'I think so too. I have a medical condition - type 1 diabetes - that makes it important to bring extra water and food. I'd like to request more of those two items.' 'I don't have a problem with you having extra water.  I'll give you all the water, if I can have all of the firewood.'
Utterance: 'I think that's more than fair. That only brings up the food to be divided. One of us is going to have to take less.'

A: Yes
****
Q: Context: 'sorry i'm not understand can you explain please?' 'I take 1 firewood, 2 water and 3 food.' 'no i need 2 pack of firewood, and 1 pack of food and 1 pack of water '
Utterance: 'That is quite unfair. You will have 0 water'

A:
Yes
****