Look, I'm sorry to keep you waiting! I really am! It's not my intention!
But sometimes I am just not ready yet, even after I have replied to you!
I am not home yet, or I have to do other things, or I have to do this, or I have to do that...
Or I have to start my laptop and he gives me troubles again..
Sometimes unexpected things happen!
I know you are waiting for me, of course I do! That's why I always hurry up, because I know we don't have a lot of time!
But you have to understand me!