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 , Lean . 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