Dear
We have assigned (name of rep) as our new
representative for your area. (name of rep)
has been with our firm for quite some time and is
extremely experienced in all aspects of our production.
(name of rep) will be coming to (name of city)
on (date) and will be calling on you in the
morning if that doesn't conflict with your schedule.
If there is any problem with that date, please let us
know.