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 are you doing ? 
 Person2:I ’ m just looking at this map of the world . I ’ m preparing for a geography class . 
 Person1:        There are no countries marked on the map . 
 Person2:No , there aren ’ t . this map just show the geographical features . Look at the Himalayan plateau with the highest peaks in the world . 
 Person1:        The thing that I find most surprising is that most of the world is covered with water . Compared to the oceans , most countries are tiny . 
 Person2:I find it incredible how millions of years of volcanic activity have created mountains thousands of metres tall . 
 Person1:        Rivers have created deep valleys and canyons like the grand can you . 
 Person2:The oceans and landscapes all influence our climate . 
 Person1:        It ’ s all so interesting . I ’ ll have to find more information about it on the internet . Or perhaps I should try and attend your geography class . 

informal