[{'role': 'USR', 'utterance': "I saw a beautiful fish in the market the other day, it was orange and blue. I'm thinking of buying some next Sunday."}
 {'role': 'SYS', 'utterance': 'Where would you keep them?'}
 {'role': 'USR', 'utterance': 'In that round bottle over there.'}
 {'role': 'SYS', 'utterance': "It's a bit small, isn't it?"}
 {'role': 'USR', 'utterance': 'So are the fish.'}
 {'role': 'SYS', 'utterance': 'I think you should get a tank if you want to keep fish.'}
 {'role': 'USR', 'utterance': 'Really?'}]
{'role': 'SYS', 'utterance': "Yes, you should never keep fish in a small round bottle. They don't get enough air. I suggest we go shopping together and look for a nice tank."}