[{'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: Return to Summary Use and Retention We use the personal information we collect to: provide and improve our Services, to provide you with a personalized experience on our sites (especially, by offering you services and items that you may like), to contact you about your account and our Services, to provide you customer service, to provide you with personalized advertising and marketing, and to detect, prevent, mitigate and investigate fraudulent or illegal activities. We may use and retain your personal information as follows: Provide, improve, and personalize our Services Provide access to and use of our Services."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]