Dearsir/madam:
Thankyouforyourletterof[date].I’mgladthatyouarealsogoingto[place]ne_tmonth.Itwouldbeagreatpleasuretomeetyouatthe[e_hibition/tradefair].
Ourcompanyishavingareceptionat[hotel]ontheeveningof[date]andIwouldbeverypleasedifyoucouldattend.
Ilookforwardtohearingfromyousoon.
Yourssincerely,
[name]