[{'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: Modifications. Dropbox may update the Services from time to time. If Dropbox changes the Services in a manner that materially reduces their functionality, Dropbox will notify Customer at the email address associate with the account, and Customer may provide notice within thirty days of the change to terminate the Agreement. This termination right will not apply to updates made to features provided on a beta or evaluation basis. Software."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_E_Mail_Address_1stParty.'}]