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 agree. I have diabetes, so water and food are super important to me. My diabetes makes me super thirsty and I have to make sure I keep my blood sugar under control with certain foods ☹️' 'I can definitely relate to that, I have family members with type 2 so I know how bad that can get' 'Yes definitely! It is a pain for sure, but I love camping so I still want to go! I just have to make sure I have all the supplies I need. '
Utterance: 'I can do without extra water as long as I have food and firewood to purify water I find.  It might be better for you to have a reliable supply though.'

SOLUTION: Yes

PROBLEM: Context: 'How many of each supply would you like? what is your favorite?' 'I am flexible, but I would prefer some food and firewood.  I have a large family to feed and all of my food needs to be cooked.' 'I also would prefer some food but am willing to give 3 fire wood in exchange for 3 water. I suffer from chronic dehydration because I sweat too much.'
Utterance: 'Excellent, I would love to help you out.  We have plenty of water to spare.  I'd gladly give you 3 water in exchange for 3 firewood.'

SOLUTION: Yes

PROBLEM: Context: 
Utterance: 'How about I take all the water and firewood, you can have all the food.'

SOLUTION:
No