@Arnav this is not a conversation that's going to make her think about you later that night.
Let's see:
Here is a good opportunity to give her a slow admiring look up and down. Ostensibly you are looking at her dress, but ya know what's underneath?
Whenever I look at a girl's body (which I often do) I look back at her in the eye and hold her gaze with a smile for a couple of seconds, to make sure she knows that I know that she knows, and I'm not sorry.
You can make a comment like:
"You're going to work looking like that? I wonder what you look like when you're really trying". As always with a smile and a steady gaze. It's a pretty strong compliment, but with a flippant tone and a slow smile you can make it a sexy one.
So what? Nobody cares, neither do you.
I'd say something like "oh so are you a nerd as well or you just like being around nerds?"
Always steering back to the golden thrust: "What sort of girl are you really?"
I like to say "What do you like to do when you're not working, netflix doesn't count".
You can for example do it like this:
"What do you like to do when you're not working?" <tap her arm, rock your body toward her> "netflix doesn't count!"
Here you need to keep pushing.
"Ah are you one of those gym bunnies?" can let your eyes drift a little here.
"You mean clubbing or are you a quiet dinner sort of girl?"
Holding eye contact and pausing before responding is also a very strong but subtle sexual signal.
e.g.
Her: "I'd rather a quiet dinner haha"
You: <pause a second, hold eye contact, make her heart speed up a bit> "Ok, I like that!"
No wonder you (and her) felt like bailing that was just pure polite conversation, the exact thing that a seducer offers her to avoid.
It's more than just that. It's about having the conversation
you want to have. She doesn't have to play ball, but while she's there, you're calling the shots. You're painting things the way you want to paint them - with a sexual tint. And if she wants to stay, she's accepting that.