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:       Hey , what are you doing here ? 
 Person2:I'm just shopping . 
 Person1:        What are you shopping for ? 
 Person2:Some new clothes . How about you ? 
 Person1:        Same here . 
 Person2:Have you found anything nice yet ? 
 Person1:        I found a few pairs of pants . 
 Person2:Where'd you get those ? 
 Person1:        I found them at Pennies . 
 Person2:Those are really cute . 
 Person1:        Do you want me to show you where I found them ? 
 Person2:I would like that . Thank you . 

informal