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:       Michael Johnson doesn ’ t look graceful , but he sure is powerful . 
 Person2:If I were on as many steroids as he was , I think I ’ d be powerful , too . 
 Person1:        What are you talking about ? ! He ’ s passed every drug test he ’ s taken ! 
 Person2:Those drug tests don ’ t mean anything ! He probably took some other drugs to mask the steroids . 
 Person1:        Just because Ben Johnson was juiced up doesn ’ t mean all athletes are . 
 Person2:OK , OK . I ’ m feeling a little dehydrated . Let ’ s get something to drink . 

informal