[{'role': 'USR', 'utterance': "I'm now at the airport to meet Mr. Dale, who is arriving at 3:00 PM. There will be some calls for me while I'm away. So please take a message."}
 {'role': 'SYS', 'utterance': 'Certainly. What time will you be back?'}
 {'role': 'USR', 'utterance': "Well, if the plane arrives on time, and then I'll be back around 5:30 PM."}
 {'role': 'SYS', 'utterance': 'If there is some urgent business, how can I reach you?'}
 {'role': 'USR', 'utterance': "I'll call it again. Just to make sure."}]
{'role': 'SYS', 'utterance': 'All right.'}