Use this email templates to answer your users when they make a right request.
Dear [Name of Data Subject]
On the [date of receipt], you asked us if we detained any of your personal data in our access control system for the period from [start date] at [start time] to [end date] at [end time].
In accordance with Article 15 of the General Regulation on Data Protection (GDPR), here is an extract in plain language of our access control system containing the concerned data collected during your visit.
In the hope this answer will satisfy you, please note that you received this communication within the time limit of one month set by the GDPR.