Sam and Nebula
Just because Sam was in a happy, committed relationship didn't mean he wouldn't notice a pretty redhead standing nearby and apparently waiting to speak with him. He was hardly as well known or popular as Steve or Tony, but Falcon did have some fans and he was always kind when he met them. He quickly ended his conversation with hat-lady and turned his attention to the newcomer.
"Afternoon," he said, greeting her with a smile. "You enjoying yourself?"