No small talk please.

I've been in my office for days now. I think i am purposefully avoiding doing the filing i have to do in the other office because i don't want to talk to the woman who works in there. She seems nice enough but i just can't stand small talk! I abhor it. She doesn't care what i did at the weekend, and i don't care what she did! why bother to ask?! I am really bad at making/responding to small talk. I have to actively think to ask questions in response so i don't seem rude. How do people who have 'the gift of the gab' manage to keep up conversations? How do they think up what to say? I think everyone else who works here thinks i am snooty because i don't talk to anyone unless i have to.