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:       I'd like to purchase a parking permit for next semester .  
 Person2:Are you a daytime student or do you just come in the evenings ?  
 Person1:        I am a daytime student .  
 Person2:Will you be driving a motorcycle or a car ?  
 Person1:        I will be driving my car .  
 Person2:OK , that will be twenty-five dollars . How would you like to pay for it ?  
 Person1:        I'll pay for it with a check .  
 Person2:Would you like to pay for any extra permits for another vehicle ?  
 Person1:        No , thanks ; I'm fine .  
 Person2:Here you go then . Have a great school year ! 

informal