Yeah, this hairstyle can go with any dress style. Umm...you can have the simple half-tied style and wear a elaborate clip, or you can ask the hairdressers for a bun style which works for mostly-straight hair...also try googling hairstyles, half down half up, formal hairstyles, etc and they should have pictures.

Have fun!
E.g.
http://www.beautywish.com/half_up_half_down.htm
There so many!