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:     Is this the foreign exchange department ?  
 Person2:  Yes , can I help you ?  
 Person1:      I need some US Dollars .  
 Person2:  What kind of currency have you got ?  
 Person1:      RIB . By the way , what is the exchange rate today ?  
 Person2:  One US Dollars in cash is equivalent t0 7.9 Yuan .  
 Person1:      And I want to change 4000 Yuan .  
 Person2:  Minus the fee . Here are your dollars . Please sign here .  
 Person1:      OK , thank you . 

1