It's hard to find much footage of this dialogue, so here it is: Garrus romance dialogue/banter from the Citadel DLC. It's bugged (still, in LE), so it doesn't trigger without a minor workaround.
This convo is after the squad comes to the apartment following the pick-up from Cision Motors. Clicking him triggers the platonic version of the banter instead (he'll say something about it only taking 5 minutes for you to get shot at).
As soon as you trigger it, save manually. Load that save and click him again, and it will play the romanced version correctly.
![](https://s2.save4k.ru/pic/394Txd9G8d0/maxresdefault.jpg)