[{'role': 'USR', 'utterance': 'Liz, do you have a minute?'}
 {'role': 'SYS', 'utterance': 'Yes, of course. What is it?'}
 {'role': 'USR', 'utterance': 'I need you to help me set up for my presentation Thursday morning.'}
 {'role': 'SYS', 'utterance': 'Okay, what should I do?'}
 {'role': 'USR', 'utterance': "Well, it isn't at this office. It's over at the Dayton Street office. Have you been there before?"}
 {'role': 'SYS', 'utterance': 'Yes, of course. I have to go there every Tuesday.'}
 {'role': 'USR', 'utterance': 'Good. So you will have no trouble finding it.'}]
{'role': 'SYS', 'utterance': "What's the presentation about?"}