TASK 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.
PROBLEM: Context: 'Hello! Which item do you need the most?' 'Well we actually really NEED all three items.. but I know you might, too - so I want to make a deal that's fair for you.. is there anything in particular your family needs for the trip?' 'Well, there has to be an item that you need the most. If you tell me what you need the most, we can try to make a deal around it.'
Utterance: 'Oh I see, its going to be THAT kind of negotiation 🙂  Let's just look at it this way.. I'm with a couple other Floridians so we're not really too worried about firewood as we prefer it cooler, anyway.. and we know the lake is nearby that's stocked with trout for eating if necessary (and of course some fresh water's there, too) - so.. I can tell you that I could go totally without Firewood if I needed to.. I'd rather not, but I could.'

SOLUTION: Yes

PROBLEM: Context: 'Hi, 🙂 It's nice to meet you as well: I also hope we can work something out: Food is my excess trip priority, What is yours?' 'Mine is firewood with second being food.' 'I'm definitely willing to give up some food for some firewood: That seems like a place where we can come to an arrangement: Would you like to make an opening offer? '
Utterance: 'Sure!  I figure I can go with little water as we can get it from the stream and boil it.  So for water I would be willing to give you 2 packages.  Would that be fair?'

SOLUTION: Yes

PROBLEM: Context: 'Hi, it is nice to be going camping. I do not have a very good sleeping bag and I can get cold at night. It would be nice to have extra firewood. I dont eat much so I do not need much extra food. Would you be willing to give me two packages of firewood for a package of food?' 'I enjoy camping as well. However, my campsite seems to be a bit chilly at night. I'd be willing to part with some firewood, yet I'd need quite a bit of food to compensate. I also have a stream nearby so water is plentiful if you need that as well.'
Utterance: 'I may be able to do something with regards to food. Do you have enough water?'

SOLUTION:
Yes