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 heard that ben is forming his own band . 
 Person2:it will be a rock and roll band probably . He ’ s a very good guitarist . 
 Person1:        can you play a musical instrument ? If you can , he might ask you to join the band . 
 Person2:I can play drums , but I haven ’ t played for a while . I ’ m not sure I ’ d be good enough to play in a band . 
 Person1:        I wish I could play a musical instrument . I love music . 
 Person2:nowadays , you can be a DJ . You can mix dance music . You don ’ t need to be able to play musical instrument or sing . 
 Person1:        I'd love to try it.but the equipment is expensive and it was still take a lot of practice . 
 Person2:you know , you could probably get a computer program that would help you . You already have a computer , so you could use that to help you mix some music . 
 Person1:        that ’ s a great idea . I ’ ll search for some information on the internet . If it ’ s possible to do , the internet will have some information about it . 

informal