[{'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: Accordingly, all of our rules, policies, and operating procedures concerning customer orders, customer service, and product sales will apply to those customers. We may change our policies and operating procedures at any time. For example, we will determine the prices to be charged for products sold under this Program in accordance with our own pricing policies. Product prices and availability may vary from time to time. Because price changes may affect Products that you have listed on your site, your site may only show prices when we serve the link in which those prices are displayed. We will use commercially reasonable efforts to present accurate information, but we cannot guarantee the availability or price of any particular product."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]