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:     Can I help you ? 
 Person2:  Yes , would you like to tell me what's playing for tonight ? 
 Person1:      Sure . There is a folk concert tonight . 
 Person2:  Are there any good seats left ? 
 Person1:      Sorry . There are only some seats in the back . 
 Person2:  Well , what time does it begin ? 
 Person1:      It begins at 7 p . m .. 
 Person2:  OK . I see . 
 Person1:      How many tickets do you want ? 
 Person2:  Just two . 
 Person1:      OK . Fifty yuan for each . 
 Person2:  Here is the money . 

1