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:       Lucy , you ’ re back . How was your first day of school ?  
 Person2:It was great . I had a really good time .  
 Person1:        What classes did you have ?  
 Person2:Well , I had English from 9 o'clock to 11 o'clock , art from 12 o'clock to 2 o'clock , and math from 2 o'clock to 4 o'clock .  
 Person1:        What do you think about the teachers ?  
 Person2:To be honest , I liked all of them , except for the math teacher . Though he must be quite young , he seem like an old person . He ’ s so boring !  
 Person1:        That ’ s too bad . How was your English teacher ?  
 Person2:She was great . In today ’ s class , she gave us a lecture on how to be a good student . She told us not to arm for exams , and to pay more attention on communicating than memorizing .  
 Person1:        Where is she from ?  
 Person2:She said that she ’ s from a small town in the middle of America .  
 Person1:        Were you able to understand everything that she said ?  
 Person2:Not everything , but nearly . She speaks very clearly and doesn ’ t use very complex words so that it is easy for us to understand her .  
 Person1:        She sounds like a good teacher . Do you think you ’ ll pass her class ?  
 Person2:Yes ... with flying colors !  
 Person1:        What does that mean ?  
 Person2:It ’ s a new phrase that she taught us today . It means that I will not only pass the class , but I will do extremely well !  
 Person1:        If you like the class this much already , I ’ m sure you will .  
 Person2:I hope so .  
 Person1:        did she give you any homework ?  
 Person2:not today . She said she wanted us to relax tonight instead of doing homework ,  
 Person1:        no wonder you like the class so much . 

informal