The University of Calgary's Campus Security put out an alert Friday night about a sexual assault on campus.
Security said the man allegedly met the woman at the campus bar, The Den, before offering to help her find her friends.
The assault is described as taking place in the U of C's Science B building.
The man is described as Caucasian with brown hair, around or just under six feet tall with a medium to heavy build.
Calgary police attended, but say the victim declined to file a police report so no criminal investigation is underway at this time.