TASK DEFINITION: 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.
PROBLEM: 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? '

SOLUTION: No

PROBLEM: Context: 'No, I don't have any plans for this weekend. Can we camp together?' 'If you want to tag along, sure.  lol  I'll be heading to the mountains so it's going to be hot during the day and cold during the night.' 'Great, hey, I'll make you an offer, I'll keep 3 firewood, 3 food and...'
Utterance: 'Would I be able to take 2 firewood and 3 waters and then you take the res?'

SOLUTION: No

PROBLEM: Context: 'I need all the food packing and some basic needs for the camping, may I know about your first though on which you need additional package?' 'I will need food packaging as well, so unfortunately I cannot agree on you taking it all. I will need 2 of the food packages, 1 of the firewood, and 2 of the water as I want to ensure to feed/hydrate my family of 5.. Does this work for you?' 'I can't agree to this, as I have to feed my family with 7, so I would be needing 3 food packages and 2 water and 2 firewood. will this be agreed by you?'
Utterance: 'No, that will not work. That does not leave me with hardly anything to feed my family of 5 😮. I will not agree to you taking 3 food packages. I can agree to me taking 2 packages of food, 2 of firewood, and 1 of water.'

SOLUTION:
Yes