Please Help ID This Film

An ordinary man somehow ends up with the appointment book of some kind of international arms dealer. He starts going to the arms dealer’s appointments, but nobody shows up.

Thanks in advance!

It could it be “The Passenger”:

http://en.wikipedia.org/wiki/The_Passenger_(film)

BRILLIANT movie, with one of the most astonishing single-shot scenes ever accomplished, and that rarest of things in movies: a perfect ending.