[{'role': 'USR', 'utterance': 'I hear a businessman is building a dog park in our city.'}
 {'role': 'SYS', 'utterance': 'Really? What for?'}
 {'role': 'USR', 'utterance': "Obviously because there's a law against having dogs in the streets."}
 {'role': 'SYS', 'utterance': 'Does it mean that dogs have to stay at home all the time?'}
 {'role': 'USR', 'utterance': 'Sounds pretty cruel, right? Maybe a dog park is a good idea.'}]
{'role': 'SYS', 'utterance': 'Maybe they should just allow people to walk their dogs in the streets.'}