Definition: 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'.
Input:  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