[{'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: Provision of Information ELEX users always have a choice whether or not to disclose information. Certain information is required for registration of our services, but most other requested information is optional. It is a top priority at ELEX to make its user feel comfortable and in control."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]