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: 'I think we will need more extra food than that.  How about the reverse, I get 2 food and 1 water and you get 1 food and 2 water.' 'I could do that if I could then get 2 packages of wood as well because it's been bitterly cold this time of year at night in the Alleghenies.' 'That sounds fair.  So I would get 2 food, 1 water, and 1 firewood.'
Utterance: 'Yes.  That's mighty kind of you and I'm glad we both got what we needed.'

SOLUTION: No

PROBLEM: Context: 'I do a lot of hiking mostly, love to take scenic photos. I usually carry food and water supplies?' 'Me too. I am not good at hunting or fishing. So I generally try to take extra food' 'Haha I suck at those activities as well. I don't usually don't eat a lot, so I'm happy to exchange some food supplies for water supplies. '
Utterance: 'I would be willing to do that. What do you propose?'

SOLUTION: No

PROBLEM: Context: 'Sending good luck your way! Any items in particular you need for your trip?' 'Well, I'll start with a trial offer and we'll go from there' 'Ok, offer away!'
Utterance: 'Well, food is high on my to do list only because I have a big family and we all know how they eat..... Wood well, I can find that along the way if necessary, and same as water so both of those are fairly low on my list... you?'

SOLUTION:
Yes