Who is Charlie?

It was April fools Day and I had decided to soak in a warm bath and relax. I slowly lowered myself into the almost unbearably hot water and opened my new book looking forward to reading the first pages. Just as the numbness was beginning to subside from my ass, as for some reason I enjoy my bath to be unnaturally hot, the phone rang. Luckily I have learned to take the phone with me when I have a bath and I answered it quickly. The voice on the other end was unfamiliar. It was an elderly woman with a quivering shrill sounding voice and a British accent.

"Hello, is Charlie there please?" she enquired.
"No, I'm afraid you have the wrong number." I answered.
"Well can you tell him to call me when he is free." She unwittingly added.
"I'm afraid there is a misunderstanding, you have the wrong number..." I tried to reiterate.
"Wrong number?" she questioned, "Oh alright then dear," she continued, seemingly comprehending my words, "Well if you could tell him to call Mabel, I would appreciate it."

I again tried to help Mabel understand. "Charlie doesn't live here, you must have the wrong number." I spoke clearly and enunciated every syllable.
"Does he have company?" Mabel continued, "Because I would surely be grateful if you would tell him I am looking for him. When he is free it would be lovely if he would call me."

I relented, waiting for a chuckle or a hint of familiarity in the voice, as surely to goodness this could not be real. Someone had concocted a rather clever April Fool's joke, and I was indubitably the victim. I paused....Still no sign of the joke concluding. I finally replied, "Mabel, I'll let Charlie know you called, and as soon as he's in I'll have him phone you."

So was it a joke? Well traditionally the joke ends eventually with an utterance of "April Fools!!" at the end, and no such words were ever said. Perhaps some of my friends are still laughing at this joke, as I am notorious for playing these same type of hi jinx on my friends, and it could be that whoever it was, is reading this very same sentence that I am typing right now and waiting for this very moment to reply with a comment saying "April Fools!" But I think Mabel was a real person, confused and unaware that her past had gotten away from her. Who was Charlie? A long lost love? A family member? A friend? I hope she finds him, whoever he is.