An anonymous phone call hey, what a way to get a mans attention, Tim was very suspicious about the call but as far as he knew every government agency in the world was still looking for him in Europe so he went to the address given, its a quiet diner there are a few customers and it will be easy to keep a low profile here, so he grabs a booth next to the door, "easiest escape route in case this is a setup" he thinks to himself as he sits seemingly browsing the menu. 

Tim quietly sits at his booth looking over the diner, always vigilant, watching everybody and everything around him its as he is doing his initial scan that he sees a waitress approaching him, a pretty young thing not that he has any interest in woman anymore being as old as he is but when the waitress reaches him and pours him a cup of coffee she doesn't greet in a friendly manner or ask him how his day is as a waiter usually would but instead leans in as she's pouring his coffee and tells him that the two men in the far booth bought him said coffee.
The signal, Tim thinks to himself as the waitress turns, his scan of the premises no longer important, his eyes now only fixated on the two men sitting in the far booth, Tim takes his time to observe them, one man with dark hair wearing a leather jacket and another sitting across from him with light hair and an impressive beard not unlike his own wearing a grey t-shirt.
Tim watches them for a while until he is sure that these are indeed the right men, after which he slowly gets up from his booth and moves to the one closest to them as he sits he makes a comment sure to get their attention if they are indeed the right guys "Can't teach an old dog new tricks" he says now looking directly at them.
At worst if it's not them they'll simply think is a crazy old coot and ignore him, its worth a shot right.