The Lighted Way by E. Phillips Oppenheim

At the Milan, Arnold found himself early for luncheon. He chose a table quite close to the entrance, ordered his luncheon with some care, and commenced his watch. A thin stream of people was all the time arriving, but for the first half-hour there was no one whom he could associate in any way with his commission. It was not until he had actually commenced his lunch that anything happened. Then, through the half-open door, he heard what he recognized instantly as a familiar voice. The manager of the restaurant hurried toward the entrance and he heard the question repeated.

"Is Mr. Rosario here?"