TASK DEFINITION: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
PROBLEM: THEM: book and 2 balls to me YOU: deal.

SOLUTION: Yes

PROBLEM: THEM: i would like to keep the books YOU: ok if i can have the hats and the ball.

SOLUTION: No

PROBLEM: THEM: can i have the ball and two books please? YOU: deal.

SOLUTION:
Yes