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:       What do you like to do with your free time ?  
 Person2:Study English .  
 Person1:        You mean you like to study English ? Why ?  
 Person2:It gives me great satisfaction .  
 Person1:        Studying English wouldn't give me any satisfaction . It's hard work .  
 Person2:I don't mind the work . I think it's worthwhile . 

formal