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: 
Utterance: 'Hello, I would like to have three packages of food. We've decided to stay an extra night but need more food to do so.'

SOLUTION: Yes

PROBLEM: Context: 'I would really like some extra firewood to keep the chill off on those cold  nights.🙂'
Utterance: 'Me too. It has been rather cold lately! But I am also really interested in water.'

SOLUTION: Yes

PROBLEM: Context: 'I have definitely been there before! With taking all the kids I'm worried about them getting dehydrated. I also have a 7 month old that needs water to make her bottles! I was hoping to get 3 extra packaged of water for sure. ' 'That is one of my fears as well. Does you seven month old breast feed? I am hoping for the water as well. I would love to give them to you if I had extra. Is there anything else you need?' 'No they don't ☹️ She is starting to eat a few solid food items. So if I had some extra food that would help. I think if I had 2 waters, 2 food, and 1 firewood to be able to cook and keep things clean I would have enough. '
Utterance: 'I can give you 2 waters, but I would need all the food because my group is bigger. You can have two firewood.'

SOLUTION:
Yes