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:       Hi , my name is Lean , and I'm from Russia . 
 Person2:Nice to meet you , Lvan.My name is Alike . I'm from Japan . 
 Person1:        To me English is a difficult language . 
 Person2:A second language is always difficult . 
 Person1:        True , but English is harder than most.It ' s a crazy language . 
 Person2:A crazy language ? Why do you say that ? 
 Person1:        One letter can have several pronunciations and one word can have several meanings . 
 Person2:No wonder you say English is a crazy language . 

informal