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 , I'm Jack . Are you Christina ?  
 Person2:  Yes I am . Nice to meet you , Jack .  
 Person1:      Are you from Italy , Christina ?  
 Person2:  No , I am German . I live in Munich .  
 Person1:      Really , I went to Munich last week .  
 Person2:  And did you like it ?  
 Person1:      Oh , yes . It is a fantastic city . And I like German food as well .  
 Person2:  And where are you from , Jack ?  
 Person1:      I am from California in the United States . But I am now studying in England .  
 Person2:  What are you studying ?  
 Person1:      I am studying languages . This year I am doing German and Italian .  
 Person2:  Oh , excellent . Why don't we talk in German for a while then ? 

1