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:     I would like to return this pair of shoes . 
 Person2:  Do you have a sales slip ? 
 Person1:      Here it is . 
 Person2:  Sorry , things on sale are not allowed to be refunded or exchanged . 
 Person1:      Oh , but this pair of shoes are a bit too tight . Could I change them for something bigger ? 
 Person2:  All right . Wait a minute . 

0