You will be given a definition of a task first, then some input of the task.
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.

Context: 'Well, I have two teenage boys who will be with me.  In normal circumstances they go through a lot of food.  While camping, hiking and kayaking I know we will need plenty to keep their energy level high to do everything.🙂' 'Well I will definitely need 2 packages of food and 2 of firewood for survival.' 'I am definitely ok with giving you two of the firewood!!  Why do you need 2 packages of food?'
Utterance: 'I have a very fast metabolism and a dog to take care of. Thanks for the firewood.'
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
No