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:       You know , Mary , I feel we meet somewhere before . Where were you born ?  
 Person2:I was born in Beijing , but I spent most of my childhood in London .  
 Person1:        What was your childhood like ?  
 Person2:I had a pretty strict upbringing , and my parents taught at universities so they have extremely high expectations for me .  
 Person1:        Where did you go to university ?  
 Person2:My parents wanted me to stay in Beijing , but I decided to go back to England . I graduated from University of Newcastle upon Tyne with a degree in Cross Culture Communication .  
 Person1:        What is your current occupation ?  
 Person2:I am a journalist . I write for China Daily .  
 Person1:        Did you know that you wanted to be a journalist right after your graduation ?  
 Person2:No , I didn ’ t . I started working at a university in London but as time went by , I found I did not really like my job . I decided to explore other fields . Journalism is great fit for me as well as a challenge .  
 Person1:        Do you like your current job ?  
 Person2:Yes , I came to Beijing two years ago looking for new opportunities . I was lucky because my friend introduced me to my current company . 

informal