[{'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: Changes to the policy We reserves the right to update this privacy policy at any time. If we make any material changes we will give notice to you on this page. We encourage you to review often this page for the latest information on our privacy practices."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]