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:       What can I do for you ?  
 Person2:I need a passport .  
 Person1:        You can apply for one here .  
 Person2:When can I do that ?  
 Person1:        If you like , you can apply right now .  
 Person2:That would be great .  
 Person1:        I ’ m going to need you to complete this application .  
 Person2:What else do I have to do ?  
 Person1:        Then I will take your picture for your passport .  
 Person2:How long will it take ?  
 Person1:        Your passport will be ready in a few weeks .  
 Person2:Thank you . That ’ s perfect timing . 

informal