[{'role': 'USR', 'utterance': 'How do I use the powder?'}
 {'role': 'SYS', 'utterance': 'Please dissolve the powder in hot water. Soak your hand or foot in it for 20 minutes twice a day.'}
 {'role': 'USR', 'utterance': 'How do I use the eye-drop and ointment?'}
 {'role': 'SYS', 'utterance': 'Put the eye-drop into your right eye 4 - - 6 times a day, 1 - - 2 drops each time. Squeeze a bit of the ointment on your eyelid every night.'}
 {'role': 'USR', 'utterance': 'Well, I see. Thanks.'}]
{'role': 'SYS', 'utterance': "You're welcome."}