Blame It on the Bellboy

Blame It on the Bellboy is a 1992 BritishAmerican film comedy written and directed by Mark Herman, revolving around a case of mistaken identity of three individuals with similar sounding surnames staying at the same hotel. Dudley Moore plays the role of Melvyn Orton in the film.

Three men board the same plane at Heathrow Airport bound for Venice Melvyn Orton, a shy and unassuming clerk with an assignment of purchasing a house in Venice under penalty of losing his job Mike Lawton, a hitman en route to Venice to kill his next mark, and Lord Maurice Horton, a rather large man who is mayor of a small city in the United Kingdom.All register in the Hotel Gabrielli. The first to check in is Maurice. He establishes that his name is Horton with an overeager bellboy who struggles with properly pronouncing the letter H. Melvyn arrives next. He is checked in by the hotels manager, who initially believes that he and Mr. Horton are the same person until Melvyn clarifies the spelling of his name. Third to arrive is Mike Lawton. They are all expecting messages Melvyn from a real estate agency that is selling a worthless villa in the Lido, Mike from the Mafia and Maurice from a dating agency called MediDate. When the bellboy receives the message for Melvyn, he mistakenly delivers it to Maurice. The message from MediDate goes instead to Mike, who now believes that his mark is the woman Maurice was supposed to meet with. Melvyn, meanwhile, receives Mikes instructions to visit a local mob boss. ........

Source: Wikipedia