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:       Hi , I was wondering how I'd go about getting a credit card .  
 Person2:Certainly , Sir . You do have a Current Account with us right ?  
 Person1:        Oh , no , I'm afraid I don't . Is that necessary ?  
 Person2:Yes , Sir . In order to get a credit card with us , you'll need to open a Current Account here . Could you please fill out this form with your relevant details ?  
 Person1:        That's done . Do you need to see any credentials ?  
 Person2:Yes , a passport will be fine .  
 Person1:        I don't have my passport on me at the moment . I'll just pop back to my office and pick it up .  
 Person2:That's fine , Sir . We'll see you again a little later . 

formal