The statement "you have a phone call at the hostess stand" was heard quite frequently in restaurants not to long ago. The fact was emphasized when I was watching a movie the other evening where a restaurant diner was directed to the hostess stand because he had a call.
The world has changed in a very short time. No one calls the restaurant to see if so and so is there. They text, call on cell phone or check location based services to determine where the individual is.