[{'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: 17.2 Without affecting paragraph 21.8 below, we reserve the right to update these terms from time to time by posting the updated version at that address. We may do so for a number of reasons including without limitation because we change the nature of our products or services, for technical or legal reasons, or because the needs of our business have changed. You agree that if you do not accept any amendment to our terms then you shall immediately stop accessing and/or using our Services."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]