You will be given a definition of a task first, then some input of the task.
You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. Your task is to classify the conversation either convey 'No emotion' or 'Happiness' by providing '1' and '0', respectively.

Person1: I ' m sorry , but I can ' t find the book that you lend me .
Person2: Oh , that ' s alright .
Person1: I must apologize . I ' ll buy you a new one tomorrow .
Person2: No . Please don ' t . I couldn ' t let you do that .
Output:
0