[{'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: We may personalize or refine communications content for you based on the products or services you use, subject to your communications choices. For example, we may send you "tips and tricks" communications designed to help you use our products or services more efficiently.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]