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.

Example Input: Context: 'Hi, I'm hoping we can come to a nice deal. 🙂 I'm most interested in firewood, because it always helps to have extra if your fire goes out.' 'That makes sense. I'm also interested in firewood, but have a great need for water due to the current weather. '
Utterance: 'That makes sense. How about we start out with I get 3 firewood, and you get 3 waters?'
Example Output: No

Example Input: Context: 'I can do that. Would you also be able to give me one firewood?' 'Sure, I can spare that' 'I really appreciate you being so kind. I have so much medication to take and have to make sure I take it with lots of water.'
Utterance: 'Its ok'
Example Output: No

Example Input: Context: 'that's so kind of you! could I please have 3? which item do you really need, I can give you 3 of it' 'okk i want 3 pack of firewood , 1 pack of food and 1 pack of water' 'could i have 1 firewood, if you'd like 1 pack food?'
Utterance: 'ok i will give '
Example Output:
No