Wrong Number

In the wee hours of the morning, Jeff was awakened by the sound of the
telephone. He stumbled to the kitchen and picked up the phone. "Is
Robert there?" a female voice asked.

"No, I'm afraid you have the wrong number," Jeff replied.

"Is this 555-1212?" the woman asked.

"No," said Jeff, "this is 555-2121."

"Oh, I'm so sorry for disturbing you," the woman said.

"That's alright," Jeff said, yawning. "I had to get up to answer the
phone anyway."