Girls what would you think if a guy asked you if you had a boyfriend in conversation?

if they say they are not dating anyone in particular or don't have a boy friend then the way is clear for a guy to make a move and they are obviously interested in getting to knows the girl better and maybe they should exchange phone numbers and start texting and eventually i would think the guy would ask the girl for coffee, or whatever you do these days and possoibly for a date.