What does this dream mean?

I had a dream, I was in the wild wild west. I was looking for a girl names Lisa. To find her I was riding a horse. For almost the whole dream I was just riding a horse by a lot of cacti. It seemed like I rode forever. One of the things that stood out to me was that I had a six-shooter/revolver but I only had 4 bullets in it. I finally found Lisa and she said that her name was pronounced "Leyasuh." I then noticed what we were wearing. If colors matter I was wearing black chaps over black pants, a black leather vest over a royal and baby blue plaid shirt, black boots, and a black cowboy hat. She was wearing a tannish yellow jacket over a white dress shirt, brown pants, black boots, and a brown cowboy hat. I asked, "Are you Lisa?" She said "Yeah, what's it to you?" and then I woke up. WTF? Any help at all would be appreciated.