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:     You look so happy , Anna . Any good news ? 
 Person2:  Yes . I ’ Ve won the first prize in the math contest . 
 Person1:      Really ? Congratulations ! 
 Person2:  Thank you , Paul . 
 Person1:      By the way , would you like to have dinner with me tomorrow evening ? Tomorrow is my birthday . 
 Person2:  Good , happy birthday to you ! 
 Person1:      Not so soon . It ’ s not my birthday today . Well , you ’ ll come , won ’ t you ? 
 Person2:  Sure , I will . Thank you for inviting me . 
 Person1:      My pleasure . 

1