I assume you mean the Cabin Service Director, often to be found sitting in his 'office' on the 777 doing 'paperwork' for the duration of the flight? If he's not there, try looking in one of the premium seats, he might be taking in a movie- or telling the FO he can't have his meal there and must go back to the flight deck immediately. In the unlikely event you've not tracked him down yet, then he may be one of the few hard working ones earning his £39K basic + allowances.