First the drawings weren't all that great, not too bad but nothing to brag about.
The animation was almost non-existant, the only things that really moved were the lips of your characters and it wasn't even very good...
The diologue was, in a word, dry. It was just uncomfortable to sit there and listen to it. It wasn't even very funny, there wasn't even much of a punch line at the end.
Basically this was just some diologue with drawings, it needs to be much more than that.
To start making this into something good you need to animate you characters at the very least. Don't drag out a conversation to 2 minutes that only needs to be one.
You have a good concept here but that's the only light at the end of the tunnel for your submission. Good luck with future projects though :)