I made a reservation online on Sunday to celebrate our 25th Anniversary by taking a tour of the Hoover Dam and Grand Canyon. The web page mentioned 24 hour notice so I called to confirm. Twice on Sunday then at 545 am on Monday because I was concerned about not receiving an email confirmation. Agent stated she had no record of my reservation. I have a confirmation #, my CC was charged and the agent yesterday had my reservation. After all how would I know to be outside at 6:00 AM the Hammond Street side. Remember the agent told me no record of my reservation? Funny, when I turned down her offer to send me tomorrow she asked if i wanted the cancellation sent to my email address which she gave me along with my cell phone number. Outright lie!!! Call another company, Pink Jeep and DeTours are highly rated.