[{'role': 'USR', 'utterance': "So what's wrong with the drain?"}
 {'role': 'SYS', 'utterance': "It's clogged and water won't go down."}
 {'role': 'USR', 'utterance': "Let me take a look. You know why? It's clogged with hair. No wonder water won't go down."}
 {'role': 'SYS', 'utterance': "Well, I guess people who lived here before didn't clean the bathtub."}
 {'role': 'USR', 'utterance': "You're darn right!"}]
{'role': 'SYS', 'utterance': 'What should I do now?'}