What do Margo and Q do at the SunTrust Building?

Margo and Q go to the twenty-fifty floor, where they can see all the places they visited. Q remarks on the beauty of the view but Margo thinks it all looks fake, like a "paper town" and that she hates herself for caring about the people who hurt her. She says that it is one "string" that broke inside of her. Q tries to flirt with her a bit, but she shoots him down, telling him that he's only cute when he's confident. Q briefly hopes that something will happen between them but there was no chance of this.