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:       May I help you ? 
 Person2:I would like to return this book . 
 Person1:        May I do anything else for you ? 
 Person2:I would also like to check out this magazine . 
 Person1:        I can ’ t let you do that . 
 Person2:Why is that ? 
 Person1:        Our policy doesn ’ t allow anyone to check out the magazines . 
 Person2:What things am I allowed to check out ? 
 Person1:        You are only allowed to check out books or videos . 
 Person2:I really need to check out this magazine . 
 Person1:        I ’ m sorry , but that ’ s our policy . 
 Person2:That ’ s stupid . 

informal