[{'role': 'USR', 'utterance': 'Vince, I think one of your programmers is spying on us for WebTracker.'}
 {'role': 'SYS', 'utterance': 'Pardon?'}
 {'role': 'USR', 'utterance': "I won't say who, because I'm not sure yet. But I'll know soon."}
 {'role': 'SYS', 'utterance': "Zina, I hope you're not scheming to make Elvin look bad."}
 {'role': 'USR', 'utterance': "It isn't Elvin."}]
{'role': 'SYS', 'utterance': "Dave then? Dave is a spy for WebTracker? You can't be serious."}