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:       Excuse me , do you have any English songs ? 
 Person2:Yes , we do . They are all in this book . 
 Person1:        Great , thanks . 
 Person2:No problem . Just give us a few minutes more to pull them up , though . We don ’ t get that many English singers ! 
 Person1:        Oh , I see . 

formal