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.

Example Input: Context: 
Utterance: 'Hello, how are you? 🙂'
Example Output: No

Example Input: Context: 
Utterance: 'Hello! How are you today?'
Example Output: No

Example Input: Context: 'Dang. I'm sorry for your condition. I really don't need the firewood though as I cut so much this year.. How can we negotiate? I'd hate for something to happen to you.' 'We can try to figure out a way to split the water and food in the fairest way 🙂. Firewood isn't an issue so it doesn't matter as much. I think to start something like splitting the food 2/1 and the water 1/2?' 'That might work. I can always boil it and I could use the extra food for the kids.'
Utterance: 'Ok so I propose 2 water for me, 1 for you. 2 food for you, 1 for me. Firewood would be, 2 for you, 1 for me? Please give me your opinion if you want to reverse any of that.'
Example Output:
No