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 does she do ?  
 Person2:She works as a teller in a bank .  
 Person1:        Does she go to night school ?  
 Person2:Yes . She goes three times a week .  
 Person1:        Why ? What does she want to be ?  
 Person2:She wants to be a manager .  
 Person1:        What classes does she take ?  
 Person2:She takes classes in accounting and business . 

formal