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:       Hello Michael . 
 Person2:Hello Todd . 
 Person1:        We're going to talk about Australia . Or your going to talk about Australia . So first of all how any people live in Australia ? 
 Person2:Australia ? Oh , there's about twenty million people in Australia right now . A little bit under , but close to twenty . 
 Person1:        OK . What are the biggest cities ? 
 Person2:The biggest city ? The biggest city is Sydney , then it's followed by Melbourne and then Brisbane and then I think it's Perth . But most of the big cities are on the East Coast of Australia . And Perth is on the west coast , but sort of of out there by itself . 
 Person1:        OK . Um , if you had to live in one place where would you live ? 
 Person2:I like Brisbane . I had my teenage years in Brisbane , growing up in Brisbane , um or maybe Sidney because it is a big city , but Brisbane has got the gold coast and the sunshine . 
 Person1:        Oh , nice . Actually , what is the capital city of Australia ? 
 Person2:Ah , Canberra is the capital city . But is not the biggest city . Sydney is the biggest city . Canberra was made sort of by the politicians so Sydney wouldn't get to crowded . It's a separate territory . 

formal