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:       Charlotte , have you had your supper ?  
 Person2:No , I don ’ t want to eat anything .  
 Person1:        Why ? Don't you feel well ?  
 Person2:I ’ m down in spirits .  
 Person1:        What's up ?  
 Person2:My manager jumped on me for my mistake today .  
 Person1:        You must not feel depressed about such a trivial thing .  
 Person2:I think I'm too clumsy . I can do nothing well .  
 Person1:        You'd better shape up if you want to get the job done .  
 Person2:But I doubt myself .  
 Person1:        Cheer up ! Don't let me down . We all make mistakes , and that is life . 

informal