Air Postal Service

A man sets down three pieces of luggage at a very famous International Airlines (that shall not be named) check-in counter and says, “I want the brown bag to go to London, the black one to go to Paris,” he said. “And keep the third bag here till my return from Australia next week for pick up.”
The check-in clerk blinked. A supervisor standing behind him overheard the request and came up. “I am sorry sir, but we are not the post office,” he said, “we can’t do that.”
“Why not?” the irate passenger said, raising his voice, “That’s what you did the last time!”