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:     Will it be all right to visit you this evening ? 
 Person2:  I'm sorry , but I have an appointment this evening.How about tomorrow evening ? 
 Person1:      It's fine with me . 

1