interesting conversation

In the far distant future in the year 4527, a number of scientists from all over the universe were having a convention on a far distant galaxy. Two beings were seated next to one another when they struck up a conversation.

"Where are you from?" the one asked.

"I'm from Alpha Century," he answered. "Where are you from?"

"I'm from Earth" was the answer.

"I know someone from earth," the Alpha Centurion said. "John Smith. Do you know him?"