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.

[EX Q]: Context: 'That sounds fair. The kids can bathe in the stream. We are good with 2 food packs.' 'Lol, wish i could. Then you take all 3 of the firewood, I'll take 2 of the Water and 1 of the food, sound good?' 'Just to be clear, I get 3 firewoods, 1 water and 1 food. You get 0 firewood, 2 waters and 2 food packs?'
Utterance: 'Everything sounds good except you and your family take 2 of the food, i need to lose weight anyway.'
[EX A]: Yes

[EX Q]: Context: 'Hello' 'hello, so what is your most important thing that you want? ' 'my priority is firewood. What's yours?'
Utterance: 'me and my gals thing that firewood is important also but we actually want water'
[EX A]: No

[EX Q]: Context: 
Utterance: 'Hello, what is your preference for supplies?  I would prefer to have as much extra firewood as possible, but am relatively indifferent to the rest.'
[EX A]:
Yes