Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       Did you have any hobbies ?  
 Person2:Yes , reading is my hobby .  
 Person1:        What kind of books do you like to read most ?  
 Person2:Many kinds of books . When I was a child in elementary school , I enjoyed reading fables and science fiction . When I became to a teenager at middle school , I was interested in detective mystery stories . Now I like reading romance stories .  
 Person1:        Are you in love ?  
 Person2:Why ?  
 Person1:        People say only those that are in love like to read romance stories .  
 Person2:Well , maybe . 

formal