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 elicit-pref strategy, otherwise output No. elicit-pref is a cooperative negotiation strategy. It is used to discover the preference order of the opponent in the negotiation.

Context: 
Utterance: 'Hello 🙂 What do you need most??'
Yes

Context: 'I don't think that's going to work for me, but I'm sure we can come up with an agreement.' 'okay friend you can have 3 firewood and 3 water is that good enough?' 'I am going to need some food of course. '
Utterance: 'yes ofcourse i agree with you.my dear friend will you have 1 food 3 firewood and 3 water'
No

Context: 'Hi, are you excited for the camping trip?' 'Hello! I am very excited!🙂 How about you?'
Utterance: 'Yes!  Would you mind sharing your highest priority item with me?  My most valued item right now is Food actually'

Yes