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 would like to open an account today .  
 Person2:What kind ?  
 Person1:        I want to open a checking account .  
 Person2:You need to keep a minimum balance .  
 Person1:        How much is it ?  
 Person2:You need at least $ 100 in your account .  
 Person1:        Is that all ?  
 Person2:Yes . That ’ s the minimum .  
 Person1:        What happens if I don ’ t meet that requirement ?  
 Person2:You will get a fine .  
 Person1:        How much ?  
 Person2:It ’ s going to be $ 25 . 

formal