You will be given a definition of a task first, then some input of the task.
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'.

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 !
Output:
informal