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:       Have you ever found yourself in a situation when you have to lie to people who trust you ?  
 Person2:Do you mean lying to people for their good ?  
 Person1:        Yes . Is it wrong to lie to them even if it is for their good ?  
 Person2:It's hard to say . I mean , how can you judge what's good for them ? Maybe it is best to tell them the truth no matter what it is .  
 Person1:        But sometimes it is so hard to tell the truth .  
 Person2:I know . If you're sure the truth will do harm , maybe you can choose not to tell it . 

formal