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:       Are you studying any languages here ?  
 Person2:Yes , I'm studying in the Foreign Languages Department .  
 Person1:        What are you majoring in ?  
 Person2:I'm majoring in English .  
 Person1:        Is it difficult to learn ?  
 Person2:Yes . The language is hard to learn , but it's interesting .  
 Person1:        Do you know anything about Britain and America ?  
 Person2:I'm reading a lot of books about the two countries . I like the culture .  
 Person1:        Right.It ' s important to learn the culture of a nation if you want to learn the language well .  
 Person2:You're right . 

formal