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:       Next , please . May I help you , sir ?  
 Person2:Hello , yes , I ’ d like to open a bank account .  
 Person1:        Certainly , I can can help you with that . What type of account would you like to open ? A chequing or a savings account ?  
 Person2:What features do they offer ?  
 Person1:        Well , if you just take a look here , see , with our chequing account , you can have unlimited daily transactions for a small monthly fee , and our savings account has a higher interest rate , but you must carry a minimum balance of $ 10,000 dollars .  
 Person2:I see , well , I think I ’ m more interested in a chequing account . I like to have easy access to my money .  
 Person1:        Alright , then , with this chequing account you ’ ll be issued a debit card and a cheque book . Will you require overdraft protection ? There is an extra fee for that .  
 Person2:No , that won ’ t be necessary .  
 Person1:        In that case , I ’ ll get you to fill out this paperwork . I ’ ll need your social insurance number , and two pieces of government ID . If you could just sign here , and here , and here we ’ ll be all set . Would you like to make a deposit today ?  
 Person2:Yes , I ’ d like to deposit one billion dollars . 

formal