I'm not aware of one, although the receptionist does sit behind a computer. But it's not the high (tourist) season at the moment so you should be OK to just walk in off the street with a very good chance of getting a room. If not, there are many similar hotels in the same laneway - just ask the taxi for 175 Pham Ngu Lao and you'll be OK (as long as you've prebooked the taxi at the kiosk inside the arrivals hall - I would strongly caution against going outside to get a taxi because they're completely unmanaged and unregulated. Best chance if you don't prebook at the kiosk is with Vinasun taxi's, who are usually honest.