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:       What do you do for a living ?  
 Person2:I ’ m a doctor .  
 Person1:        Really ? Do you like it ?  
 Person2:Yes , I do . It ’ s very interesting . What ’ s your job ?  
 Person1:        I ’ m a bus driver .  
 Person2:Oh , do you enjoy it ?  
 Person1:        No , I don ’ t really like it . It ’ s boring . 

informal