You ran across an old telephone in your new house that you inherited from your great grandparents. You don't know if it's still working

And so you got curious. You picked up the telephone and it already picked up a ringing tone despite not pressing any dial numbers yet. Then someone answer.

"Hello little lady~ How may I help you?"

He sound so young but an eloquent speaker, almost like he's your age but his manner of speech is too old for you to comprehend

...Then you just realized that you accidentally pressed the re-dial. You're talking to the person whom your great grandparents last called.

But who is this? Surely you can't be talking to the same person from a century ago.