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:       Hi Cody , how did practicing go this week ?  
 Person2:Well I had several tests and an oral presentation this week so I didn ’ t get a chance to memorize the second page , but I think I mastered the tricky section .  
 Person1:        Great ! Warm up with some scales and arpeggios first . Good , good . This week , work on keeping the rhythm steady when you play the last part with the sixteenth note . Now let ’ s take a look at this  
 Person2:Charles ? Before I start I was wondering if it was ok if I put a small crescendo in here and then decrescendo back to pianissimo again over here ?  
 Person1:        It might work . I ’ ll have to hear it.Show me what you ’ Ve done .  
 Person2:It was horrible ! I played play it much better at home !  
 Person1:        It ’ s just nerves . Just play the right hand for now . One two three four five six , ta ti tri-ple-ti . Good , good . Don ’ t forget the accidentals ! The key signature says that note should be a G-sharp b  
 Person2:Is that better ?  
 Person1:        Yes , much better . Watch where you lift your foot off the pedal . What was that ?  
 Person2:Sorry ! The stretch for that octave is always hard to make .  
 Person1:        That's ok , keep going , you ’ re moving ahead by leaps and bounds . Watch your dynamics ! Keep your elbows lifted . Remember to stroke the keys , don ’ t pound . That ’ s better ! Remember that as a pianist or any 

informal