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 ’ s wrong with you ? Why are you scratching so much ?  
 Person2:I feel itchy ! I can ’ t stand it anymore ! I think I may be coming down with something . I feel lightheaded and weak .  
 Person1:        Let me have a look . Whoa ! Get away from me !  
 Person2:What ’ s wrong ?  
 Person1:        I think you have chicken pox ! You are contagious ! Get away ! Don ’ t breathe on me !  
 Person2:Maybe it ’ s just a rash or an allergy ! We can ’ t be sure until I see a doctor .  
 Person1:        Well in the meantime you are a biohazard ! I didn ’ t get it when I was a kid and I ’ Ve heard that you can even die if you get it as an adult !  
 Person2:Are you serious ? You always blow things out of proportion . In any case , I think I ’ ll go take an oatmeal bath . 

informal