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 to extract your personal data in a structured, commonly used and machine-readable format and have them sent to you / have them sent to the following controller : [name other controller].
In accordance with Article 20 of the General Data Protection Regulations (GDPR), we inform you that we dully transmitted your personal data to this controller / here is a copy in plain language of all such data.
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.
Best Regards