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:       How many credits are you taking this semester ?  
 Person2:I have to have at least eighteen to keep my scholarships and grant . But so far , I only have fifteen .  
 Person1:        What's the matter , are the classes you want full ?  
 Person2:Yes . And now I'm down to either taking a class I'm not going to need or considering a double major .  
 Person1:        If you were to take on a double major , what would be your first choice ?  
 Person2:I think with International Business a language would be appropriate .  
 Person1:        Have you even thought that far ahead ? I mean what country would you like to do business with ?  
 Person2:As a matter of fact , I would like to work in South America . So some Latin language like Spanish or Portuguese would work . 

formal