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:       Can I leave early today ?  
 Person2:Sure . I don ’ t mind .  
 Person1:        And can I come in late tomorrow ?  
 Person2:I don ’ t see why not .  
 Person1:        And may I take Friday off ?  
 Person2:Go ahead . It ’ s OK with me .  
 Person1:        One more thing . Would you give me a ten-dollar raise ?  
 Person2:No . 

formal