The reason

I sent you a letter;

You had moved.

I tried to call you;

You hadn't paid your bill.

I sent you a fax;

Your paper had run out.

I emailed you;

Your account was full.

I paged you;

You didn't answer.

I texted you;

It wasn't delivered.

I sent a pigeon;

It died on the way.

I came in person;

You were out.

I left you a note;

It blew away....

I wrote you this poem;

You read it!