[{'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: Policy Changes We reserve the right to change and or update this Privacy Policy at any time, and will post any revisions on our Site. It is your responsibility as the user to keep abreast of the updates and or changes to the privacy policy."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]