Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i want the hat and 1 book. i can offer you the rest.  YOU: i can give the hat and a book - that works for me  THEM: ok to recap, 1 book to me, and the hat. rest to you, correct?  YOU: yes.
Output:
Yes