[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: The pay-per-hire model can be canceled at any time. Hires initiated before cancellation are subject to the invoicing and payment stated above."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]