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:       Let ' s got out tomorrow night . We can go to a bar and try to find you a girlfriend .  
 Person2:I don ' t think that ' s a good idea . I am just not good with approaching someone and starting up a conversation .  
 Person1:        Maybe you just need a few pick-up lines , you know , break the ice .  
 Person2:Pick-up lines don ' t work !  
 Person1:        Come on ! You can just walk up to a girl and say “ If you were a booger I \ ' d pick you first . ”  
 Person2:What ? Come on ! That ’ s just lame ! No girl would fall for that !  
 Person1:        Fine , then you can say , “ So there you are ! I ' Ve been looking all over for YOU , the woman of my dreams ! ”  
 Person2:That ' s a good one ! I think that ' s pretty funny .  
 Person1:        Yeah , so you make her laugh , you make a fool of yourself a little bit and then you buy her a drink .  
 Person2:Ok , how does this sound , “ I was so enchanted by your beauty that I ran into that wall over there . So I am going to need your name and number for insurance purposes . ”  
 Person1:        Nice ! Let ' s go ! 

informal