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 self-need strategy, otherwise output No. self-need is a selfish negotiation strategy. It is used to create a personal need for an item in the negotiation, such as by pointing out that the participant sweats a lot to show preference towards water packages.
PROBLEM: Context: 'I'm doing well. We're desperately needing wood. We didn't realize how cold it would be as it is our first time here. There is none around our area so we are really concerned about staying warm especially at night. We also forgot a bag of food, so that's another need for us.' 'True. Turns out i'm dealing with similar situation, we didn't expect weather to be as cold, so extra wood is on my mind as well. Everyone might need to go to bed earlier and cook food that cooks short time since we low on wood !' 'Yes, that's very true. I would be willing to give up water for more firewood.'
Utterance: 'I like that. I could help you out. I'd be interested in giving you some extra food for extra water. We like to go far from campsite to hike and get up to high elevation, so i need to pack extra water just in case. We go during day, when it's warmest and need extra food in case we come back at nigh time or get lost! Not ideal. '

SOLUTION: Yes

PROBLEM: Context: 'He definitely does drink a lot of water, but he's in a growth spurt so 2 would be ideal. I'm happy to give up all firewood in exchange for the extra food!' 'okay that sounds like a better deal then! I will take all the firewood and 1 food, and you can take the 2 food packages' 'Awesome, I appreciate that. How does the water need look on your side?'
Utterance: 'I think having two waters would be good for me because my mom forget to pick extras up at the store yesterday😮'

SOLUTION: Yes

PROBLEM: Context: 'Can you spare some water? I need to take medication and I have run out.' 'Hi there, that sounds important. Yes, we can make sure you get some water. How does 1 package sound?'
Utterance: 'I'd rather have 2, can give you all of my food for all of your water?'

SOLUTION:
No