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:       How are you ?  
 Person2:I ’ m great . Thank you for asking .  
 Person1:        What can I do for you ?  
 Person2:Do I owe any fees ?  
 Person1:        You sure do .  
 Person2:Could you tell me how much I owe ?  
 Person1:        You owe $ 235.13 in fees .  
 Person2:I can ’ t believe that .  
 Person1:        When will you be paying these fees off ?  
 Person2:I ’ ll pay them off right now .  
 Person1:        Cash or check ?  
 Person2:I will pay with cash . 

informal