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:       I need to pay the fine on my ticket . 
 Person2:Do you have the ticket with you ? 
 Person1:        Yes , I have my ticket with me . 
 Person2:Let me see your ID . 
 Person1:        I forgot to bring that with me . 
 Person2:You need it to pay your fine . 
 Person1:        Why can't I just give you the money for the fine ? 
 Person2:Because , I need to see a photo ID in order to verify who you are . 
 Person1:        Okay , I think I understand . 
 Person2:All right , come back and bring your ID . 
 Person1:        So once I pay this off , my record will be cleared ? 
 Person2:Once you pay it , your record will be cleared . 

informal