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: 'Yes, I get cold easy. Thanks a lot!' 'sure, i have a lot of people coming thats why i need food' 'No problems with that. I am glad we could make a deal. To summarize, you will have 3 of food and 1 of firewood while I will have 3 of water and 2 of Firewood.'
Utterance: 'yes🙂'
Example Output: No

Example Input: Context: 'It's been so cold these last few days, I'm worried that I didn't bring enough wood for the next few nights.' 'That is unfortunate. How about I give you are my firewood for all your food?'
Utterance: 'That is a very generous offer but I think I need to keep some food to be safe. Do you need any water?'
Example Output: Yes

Example Input: Context: 'hi, I'm looking forward to going camping soon' 'Me too! Camping is so much fun' 'I will want to get some extra supplies before I go. '
Utterance: 'Same. My family is coming with me so I want to make sure we are extra prepared'
Example Output:
No