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.

Input: Consider Input: Context:
Utterance: 'I will submit a deal that might benefit us both. '

Output: Yes

Input: Consider Input: Context: 'I understand. We are also planning a campfire, and have a lot of young kids who will need the fire to stay warm. So that's why I feel I need two firewoods. 🙂' 'Sorry for apologize. Here we are having old aged people here. I need two packages of food. Otherwise two of firewood.🙂' 'I understand. I am willing to give you two packages of food if I can have two firewoods. I would also like two waters due to it being hot out for our hike. 🙂'
Utterance: 'Okay. I think it will be good. Then I'll take two packages of food one of firewood and one of water.🙂🙂'

Output: No

Input: Consider Input: Context: 'yeah we got a lot of things planned for them at the campgrounds. they're going to be pretty busy' 'So what is your main focus this trip?' 'one of my kids is on medication so we are going to need to pack a lot of water. so if could spare that it would be appreciated.'
Utterance: 'Well sadly I plan to go hiking a lot so I will need lots of water, but perhaps we can come to a reasonable agreement if I have to shorten my hikes.'
Output: Yes