[{'role': 'USR', 'utterance': "There have been too many unplanned shutdowns over the past few months. We'll have to make a few changes to the way we operate. We need to reduce our downtime."}]
{'role': 'SYS', 'utterance': "I agree, but the maintenance team is fully stretched dealing with problems. We don't have time to carry out any preventive maintenance."}