Do they take reservations?

I don't think so.

No we dont, since we just opened if we had reservations its a possibility wed be too booked to get folks in. Hour call ahead will be available in june.

We tried todo a call ahead and where told they don't do reservations or call ahead

Longhorn doesnt take reservations. They do have a call ahead seating program that they are not implementing right now, due to the sheer number of people. For now, it is first come, first serve.