[{'role': 'USR', 'utterance': 'Hi, Sam. I want to buy a pet. Do you have any ideas?'}
 {'role': 'SYS', 'utterance': "You really should go to Rachel's pet store."}
 {'role': 'USR', 'utterance': 'why? anything special there?'}
 {'role': 'SYS', 'utterance': "it's more than special. You can find as many kinds of animals as you can put a name to and more."}
 {'role': 'USR', 'utterance': 'Oh, really? are there any snakes?'}
 {'role': 'SYS', 'utterance': "snakes? there are even rodents and monkeys! it's a world of exotic pets."}
 {'role': 'USR', 'utterance': "that's terrific. I can't wait to check it out."}
 {'role': 'SYS', 'utterance': 'Hang on. are you sure you want to keep a non-traditional pet?'}
 {'role': 'USR', 'utterance': "why not? it's so cool."}
 {'role': 'SYS', 'utterance': 'but it will pose a risk to your health.'}
 {'role': 'USR', 'utterance': 'pardon?'}
 {'role': 'SYS', 'utterance': 'i mean, most reptiles carry some harmful bacteria. they are likely to cause immune system problems.'}
 {'role': 'USR', 'utterance': "well, I didn't realize that."}]
{'role': 'SYS', 'utterance': "I don't believe it's a good choice to keep those pets, especially for families with young children."}