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:       May I help you ?  
 Person2:My daughter . She is missing . I don ’ t know where she is .  
 Person1:        What dose she look like ?  
 Person2:She has blond hair and blue eyes .  
 Person1:        What was she wearing ?  
 Person2:She has a yellow dress on and red sneakers .  
 Person1:        When did you last see her ?  
 Person2:I just saw her down the street . I don ’ t know where she is . I don ’ t know ...  
 Person1:        How long has it been ?  
 Person2:Oh , it ’ s been uh ... fifteen minutes . 

informal