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:       Emily , what kind of report is this ?  
 Person2:What do you mean , Mr . Smith ? You said to make it brief .  
 Person1:        Don't get smart with me . Here , do it again , but do it right this time . 

informal