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 can I do ?  
 Person2:Take the books out of the bookcase . Put them in this box .  
 Person1:        Well , the books are in the box . What can I do now ?  
 Person2:Take the magazines out of the bookcase . Put them in that box .  
 Person1:        All right .  
 Person2:Peter ! Pack them . Don't read them .  
 Person1:        These magazines are interesting . May I borrow one ?  
 Person2:Of course .  
 Person1:        Thanks , John . 

informal