personal assistant

someone hired to provide administrative support and assist with various tasks for an individual or organization

As a busy executive, she relied heavily on her personal assistant to manage her schedule and coordinate appointments.
The celebrity's personal assistant handled everything from booking flights to managing fan mail.
The entrepreneur's personal assistant helped with research, prepared presentations, and handled correspondence.
With the help of his personal assistant, the politician stayed organized during campaign events and public appearances.
The artist's personal assistant took care of studio logistics, such as ordering supplies and scheduling sessions.