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:       Is Stanley still singing that Elvis song ? He's really hogging the mike ! 
 Person2:If I hear " Love Me Tender " one more time , I think I'm going to go crazy ! 
 Person1:        He sounds like a sick cow ! 
 Person2:Can we adjust the pitch a little ? Maybe he'll sound better in a higher key . 
 Person1:        I already tried that . Nothing seems to help . 
 Person2:Hey ! Where are you going ... ? 

informal