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:     Who is it ?  
 Person2:  Open the door . It's me . I can't find the key .  
 Person1:      You're always so careless .  
 Person2:  Oh , thank you . I am exhausted . Will you bring me a cup of tea ?  
 Person1:      Okay , but I haven't prepare supper .  
 Person2:  So let's eat out .  
 Person1:      What do you want to eat ?  
 Person2:  Noodles . How about you ?  
 Person1:      Dumplings . 

1