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.
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Question: Context: 'what else is a priority for you?' 'Firewood is definitely important as well! Last time I went camping we ran out pretty fast, so I want to be extra prepared. 🙂' 'Oh no! I can see why that would be extra important to you! I will give you two of the firewood for two of the water'
Utterance: 'That sounds good to me! I think since water is pretty important on a camping trip (especially with a baby!), and since you are getting 2 extra packages of water, may I ask that I get 2 of the food packages? I have 2 (always hungry) preschoolers joining us haha! 🙂 I can never seem to keep them full'

Answer: Yes


Question: Context: 'That sounds great, I'm the most flexible on food. How many of the extra packages of food do you want?' 'I am hoping to receive 2 packages of food so that way you also have 1. ' 'That sounds great to me. I'm hoping to get 2 firewood, 1 water, and 1 food out of the deal. I'm amicable to more discussion though.'
Utterance: 'This also sounds like a fair deal to me! I am happy that we have reached a compromise so quickly on the packages based on our needs! '

Answer: Yes


Question: Context: 'That doesn't work for me. I will also need extra water because I drink a lot. How about we start by saying you get the firewood, and I'll take the food?' 'OK, but how do we split up the water? Because it sounds like we both need some. What if you take all the food and I take all the firewood and then I get two waters and you get one extra?' 'I would prefer to have 2 waters since I agreed to give you all the firewood.'
Utterance: 'But I agreed to give you all the food. Now that you want two waters, I think I should have some food because I left a bag of my food at home. You get two waters and I get one of the food. Then you get the majority of both the water and food.'

Answer:
Yes