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'll have to take a make-up exam in logic .  
 Person2:Oh , I thought I did a good job .  
 Person1:        Sorry to say you failed .  
 Person2:Anyway , I have to face the music this time . 

informal