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:       Oh . Have you finished listing your study preferences ?  
 Person2:Yes , I have .  
 Person1:        Good . So , which is your top choice ?  
 Person2:Medicine . In my country , that certainly has great prestige .  
 Person1:        I see . Which subject did you put last then ?  
 Person2:Oh.history .  
 Person1:        That's interesting . Could you give any reasons for your choice ? Can you explainwhy do you put medicine first ?  
 Person2:Well , doctors are such an important job . I mean your health is the most imponent thing you've got , isn't it ? I want to be important and help people .  
 Person1:        Yes . I suppose so . 

informal