Obviously this bloke was mental, raving about being her husband. Ginny would have laughed, in fact she started to laugh but held it back at the last second as she stared at him like he had gone completely round the bend. "I think I would know my own husband, and I've never heard of anyone named Harry Potter in my life." The part about Gryffindor intrigued her, but really he could be lying, or he could have been the Seeker well before she had been in school - that piece of information didn't mean anything, just like how multiple people had helped defeat Voldemort.
"Hermione Granger-Weasley is Ron's best friend, and Ron me from the Chamber of Secrets - not that it is any of your business." she replied, openly glaring at him. She didn't like discussing that portion of her life with her family, much less a stranger she met on the street.