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:     Have you been to Shanghai before ? 
 Person2:  Yes I have . I ’ Ve been there three times in the past year . 
 Person1:      That sounds great . Have you been to the top of the Pearl Tower ? 
 Person2:  No I haven ’ t . I haven ’ t visited the Bund either . I ’ Ve always had too much work to do . 
 Person1:      So you haven ’ t done much then , in Shanghai ? 
 Person2:  Actually , I ’ Ve eaten soup dumplings in a lovely restaurant on Nanjing Lu . They were delicious ! 

1