[{'role': 'USR', 'utterance': "Can I help you, ma'am."}
 {'role': 'SYS', 'utterance': 'Yes, will you keep our bags until 6 p. m. ?'}
 {'role': 'USR', 'utterance': 'Are you all our guests?'}
 {'role': 'SYS', 'utterance': 'Yes, we checked out just now.'}
 {'role': 'USR', 'utterance': 'Please fill in this form.'}]
{'role': 'SYS', 'utterance': 'Is this all right?'}