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:       What's your schedule like this year ? 
 Person2:Pretty busy . I have to pick up a lot of credits this year . 
 Person1:        What's your major ? 
 Person2:I ’ m majoring in French literature . 
 Person1:        Oh , don't you have to take that class on 18th century poetry ? It's really difficult . I hear the students in that class have to write a paper a hundred pages long . 
 Person2:That's right . We got the assignment last week . 
 Person1:        When is it due ? 
 Person2:Next Monday . 
 Person1:        Remind me never to sign up for that course . 

formal