In the beginning of the movie (the opening credits are still being flashed on the screen) Holly is being propositioned by the "Director of International Development." She responds to his come-on by saying "Harry, it's Chrismas Eve..." (this can be confirmed by watching it with CC) Now, throughout the rest of the movie this character is referred to as "Ellis." In the credits he is also referred to as just "Ellis." I thought that perhaps his name was Harry Ellis, but the fact that he is only "Ellis" in the credits and he seems to have two different names in the movie shows that somewhere a name change took place without proper documentation (credits).