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:       How may I help you ?  
 Person2:I want to return this video .  
 Person1:        Is that all you need ?  
 Person2:I also need to check this magazine out .  
 Person1:        You ’ re not allowed to do that .  
 Person2:I don ’ t understand .  
 Person1:        It ’ s our policy .  
 Person2:What can I check out ?  
 Person1:        Only books or videos .  
 Person2:I need this magazine .  
 Person1:        You will have to read it here .  
 Person2:That ’ s weird . 

informal