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:       Stand back from the door , please . Let the passengers off . You can't get on until the other passengers get off .  
 Person2:How much is the fare , please ?  
 Person1:        One dollar . Drop it in the box . Move to the rear of the bus . There are plenty of seats in the rear .  
 Person2:Wait . I want to ask you if this bus goes down Fifth Avenue as far as Greenwich Village .  
 Person1:        That's right.Move along , please.There are more people waiting to get on.Move to the rear .  
 Person2:I thought this bus Went down Park Avenue .  
 Person1:        No , that's the number l that goes down Park Avenue.This is the number 2 .  
 Person2:But I thought this was the right bus to go to Washington Square Park .  
 Person1:        It is.Get in.please.You ' re holding everyone up.You can't miss Washington Square Park .  
 Person2:Would you tell me when we get there ?  
 Person1:        It would be better if you watched out for yourself . I might forget . 

formal