What Is 'That' Suppose To Mean Poem by Lawrence S. Pertillar

What kind of an excuse is this to make,
To anyone...
'My answering machine has been messing up.
That's why I haven't responded to any of your calls.'

~Oh.
Okay!
So is it fixed now? ~

'No not really.
I had nothing else to do.
So I decided to give you a call,
To give you updates about myself.'

~Oh, okay.
I'm all ears.
Let me know if you have an interest,
In what I've been doing without interruptions.~

'And what is 'that' suppose to mean? '