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:       I'm busy year in and year out , but now I've done nothing .  
 Person2:You've done a lot , my darling !  
 Person1:        I may have done a lot , but none is to my satisfaction .  
 Person2:You're too strict with yourself .  
 Person1:        Perhaps . I'm dead tired . 

informal