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:       OK . Come back into the classroom , class .  
 Person2:Does the class start again , Mam ?  
 Person1:        Yes , but to the health , this break has long enough .  
 Person2:Oh , breaktime flies .  
 Person1:        come on , baby . It ’ s time now .  
 Person2:Mam , another minute , could I ?  
 Person1:        Hurry up , little boy . 

formal