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:       Where is Pamela ?  
 Person2:Is she coming ?  
 Person1:        She told me she'd be here .  
 Person2:They are announcing your flight . You'd better board the plane .  
 Person1:        Are you rushing me ?  
 Person2:I am just reminding you about the time . You don't want to miss the plane , do you ?  
 Person1:        I know what I am doing . Don't worry . Can you do me a favor ?  
 Person2:Name it and I'll do it for you .  
 Person1:        Take care of Pamela when I am away . She is a nice girl . I don't want her to get hurt or anything .  
 Person2:I've got it .  
 Person1:        Thank you . Now I see that you are my true friend . Most of my so-called friends left me at the moment my company went bankrupt . You are the only one who has stood by me the whole time .  
 Person2:I am just doing what I think I should do .  
 Person1:        Thank you for being a friend of mine .  
 Person2:This isn't like you ... Well , I hope you will have a nice flight and a successful start in business .  
 Person1:        Thank you . I have to leave now . If you see Pamela , tell her I'll write to her . 

informal