Part 1. Definition
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 no-need strategy, otherwise output No. no-need is a cooperative negotiation strategy. It is used when a participant points out that they do not need an item based on personal context such as suggesting that they have ample water to spare. no-need can directly benefit the opponent since it implies that the item is up for grabs.
Part 2. Example
Context: 
Utterance: 'how about I give you 2 waters and 1 food package in exchange for all your firewood?'
Answer: No
Explanation: The utterance does not use the no-need strategy since it never refers to an item that the participant does not need.
Part 3. Exercise
Context: 'Tell me why you need so much firewood?' 'I have other people coming with me and we don't have insulated sleeping bags.  The temperature also drops drastically at night.' 'Well i need at least 1 firewood so we have to make that work'
Utterance: 'How about this I get 2 packages of firewood and 2 packages of water.  You can have all my packages of food. This will be a hunting camp trip for me.'
Answer:
Yes