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:       Is that the latest issue of Reader you're reading ? 
 Person2:Yes , it is . It has some really good articles in it . 
 Person1:        I know . I have been a subscriber for the past two years . 
 Person2:I didn't know that . How much does it cost to subscribe ? 
 Person1:        I'm not exactly sure , but it's not that expensive at all . 
 Person2:I used to subscribe to it , but I cancelled my subscription last year . 
 Person1:        Why did you do that ? 
 Person2:I was the only person in my family reading it . Everyone in my family just likes to read Fashion . 
 Person1:        It's the same in my family . The coffee table in my living room is covered with copies of Fashion . 

formal