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: 'I think that would work for us!' 'I am willing to make that deal.' 'Perfect! Let's plan on this between the two of us. Thank you for working so well with me. You made good points and I appreciate finding a proper solution. 🙂'
Utterance: 'Your welcome.  Have fun at the Puget Sound!🙂🙂'
Example Output: No

Example Input: Context: 'I am just going to walk away,  I can't have my family freeze' 'I do not want my family to freeze either but walking away doesn't benefit either of us. How about I take the water and 2 firewoods, you have the rest' 'No deal, I need at least 2 firewood'
Utterance: 'Ok, I can agree to 2 firewood but I will have to take all the food and water to compensate'
Example Output: Yes

Example Input: Context: 'Hello, how are you doing on this fine day?'
Utterance: 'Hello, I am doing awesome today. I am so glad I was able to get way and come camping. My bother just called me and said he is going to be coming. It was a surprise for him to be able to come🙂 How are you?'
Example Output:
No