[{'role': 'USR', 'utterance': 'Excuse me, do you think I can return these gloves?'}
 {'role': 'SYS', 'utterance': "What's the problem with them?"}
 {'role': 'USR', 'utterance': "They're too small."}
 {'role': 'SYS', 'utterance': "Didn't you try them on before you bought them?"}
 {'role': 'USR', 'utterance': 'Well, as a matter of fact, I received them as a gift.'}
 {'role': 'SYS', 'utterance': "OK, I see. I'm afraid I can't give you a cash return, but you can change them."}
 {'role': 'USR', 'utterance': 'I believe you sell these gloves for $29.95.'}]
{'role': 'SYS', 'utterance': "Yes, I'll take the gloves of the same price for you to choose."}