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:       You seemed to be fed up with Mary .  
 Person2:Yeah . I get sick of her . She always bends my ear about what she thinks .  
 Person1:        She is a barking dog . But she means well .  
 Person2:But I don ’ t like anyone who would drive me crazy by telling me what to do .  
 Person1:        You are unfair to her . She is a very nice girl . 

informal