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:       Excuse me , do you know where the visa office is ?  
 Person2:Yes , I do . I ’ ll walk you there .  
 Person1:        Thanks !  
 Person2:Are you applying to study or work abroad ?  
 Person1:        I want to study abroad .  
 Person2:What do you want to study ?  
 Person1:        I hope to study English literature .  
 Person2:Have you got your visa yet ?  
 Person1:        Not yet . I have an interview with the visa official today .  
 Person2:I see . Is it your first interview ?  
 Person1:        No , I've already been to here for three interviews .  
 Person2:What happened ?  
 Person1:        I was denied a visa ?  
 Person2:Why ?  
 Person1:        Like most students . I want to work in America after graduation .  
 Person2:I see . Well , good luck ! 

informal