Dear %FIRSTNAME,

This is a little note to remind you that you are scheduled on %APPTDATE for an appointment with %APPTWITH at %APPTTIME in our %APPTLOC office.

Thank you,

My Company Name

/* The Following Lines Will Not be Included in the Message Body
/* Use %FIRSTNAME to insert Client's First Name
/* Use %APPTDATE to insert Appointment Date in Words
/* Use %APPTTIME to insert Time of Appointment
/* Use %APPTWITH to insert Person Taking Appointment
/* Use %APPTLOC to insert Office Location