When studying camera techniques for how to film my conversation scenes, I came across the shot-reverse-shot method, which is incredibly common but can have some alterations that make it more visually interesting.
After watching several scenes from films with conversations, I was always curious regarding the camera placement during conversations. Some have a classic over the shoulder style, which creates a nice, free flowing effect and allows the audience to follow the conversation smoothly. Some are filmed in a two shot which will focus more on the body language and positioning of the characters. These shots will probably be visually more important because they will be telling another story aside from just the dialogue.
I think for my scenes, I will adopt a traditional set-up at a mid-range to allow the body language of the characters to tell another story. Both characters in my cafe scene can be described through body language so I will make sure that the shots show enough of the characters.