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 kind of job have you ever had ?  
 Person2:I used to work as a teacher .  
 Person1:        How did you like your job ?  
 Person2:Oh , if I hadn't moved here I would never thought of changing it . 

formal