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:       Would you please teach me how to use the computer ?  
 Person2:Sure , let's take a look at the menu first .  
 Person1:        Do I have to turn on the computer ?  
 Person2:yes , we can look at the computer and computer menu at the same time . And this will help us understand both better .  
 Person1:        What should I learn first ?  
 Person2:Right now I'll teach you to open files , save files and copy files . Are you ready ?  
 Person1:        I am ready I am going to get , let's start ! 

informal