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 . I am interested in getting a library card . 
 Person2:Sure , let me give you an application . You can fill it out right here at the counter . 
 Person1:        OK , here it is . 
 Person2:Let me take a look at this for you . May I have your driver's license , please ? 
 Person1:        Here's my license and form . 
 Person2:You seem to have filled the form out all right . Are you familiar with our rules and fines ? 
 Person1:        Yes , I know what to do . 
 Person2:The hours and limitations are printed on the card and this handout . 
 Person1:        OK . 
 Person2:Thank you for joining the library ; we look forward to serving you . 

informal