You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.

Person1: Hello . May I speak to David ?
Person2: Who ?
Person1: David Bush .
Person2: There ' s nobody here by that name .
Person1: Sorry , I dialed the wrong number .
0