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:       Joan is a thorough drag ! 
 Person2:What is it ? 
 Person1:        She keeps talking when I'm reading . 
 Person2:There must be something wrong with her . 

informal