How come I have nothing to say, awkward

The best advice I can give you is don't force anything. If you can't think of anything to say don't try to force it out because that can make it even more awkward between the two of you in the future. Just let things flow and if she likes you things will eventually progress if not you just gotta move on

I think you are trying too hard. I find the best way to talk to someone, is just ask them something you really want to know. Like... how's it going. What's up in your world? And then just follow the answers. Well things are ok, although I have a (something) I have to do today. Oh really what's that? and just follow. But be real. If you are not interested in whatever, then keep your mouth shut until there is something you are interested in. Fakers will be found out. You start blowing smoke in her face, and she'll figure it out real quick. I think that's why you are getting tied up. You are trying to makeup something, and you are a horrible liar. That's actually a good sign. Loosen up, and talk about what you really want, or ask something you really want answered. How are things in your department? Man, these long shifts are killing me. What is your work like? (be honest too)

After that morning coffee break, I think you got into the first step. Next time, sit beside he and talk to her just like your other friends. Maybe you can talk of her previous jobs, a little talk about your family, and other interests. You just have to start the conversation and everything will be smooth. You will later know what her interests are, then that will be a good start of conversation.