apple does this nicely - just try and create a similar appointment on an Iphone or ipad and see.
if I am trying to book a dentist appointment it knows when I start typing dentist I have done that before and can pull up all the details from my previous entry as a starting point for my new entry. This is a huge time saver. Fills in location address for example that can be used for GPS navigation. typical reminders, etc. are all preset and you only need to update the things that are changed.