This person is the right person for thier girlfriend!
This is not a prompt, this is disrespectful. Forgive me for being a bitch about it, but I've been in this position before and it's fucking annoying when someone thinks it's in their best interest to distract you from whatever the conversation is. Even if it's just chit-chat, they can fucking wait until you're done. Unless you give them a signnal for help, they can be patient.