[{'role': 'USR', 'utterance': "Hello, Amazon's customer service. How can I help you?"}
 {'role': 'SYS', 'utterance': "Hello, it's the book I got from your website yesterday when I was reading it. I found that one page is missing, page 53."}
 {'role': 'USR', 'utterance': 'I see. May I have your order number, sir?'}
 {'role': 'SYS', 'utterance': "It's B113. Dash 7423935."}
 {'role': 'USR', 'utterance': "OK. Let me check. It's the paper bag night of the Hunter written by RA Salvatore you bought on our web 10 days ago, which is on October thirteenth, right?"}
 {'role': 'SYS', 'utterance': 'Yes.'}
 {'role': 'USR', 'utterance': 'Well, we might need you to take a photo of the missing part of this book and upload it to the customer service page of our website. And when the problem is confirmed, we will send you a new book in 2 days.'}]
{'role': 'SYS', 'utterance': 'OK. Then what should I do with the old book? Should I send it back to you or something?'}