Sept 13- We had a good flight to Bangkok for connection to Ho Chi Minh City. When we got to Bangkok, we saw a sign that the flight was cancelled. When we asked about our options we were told there was another flight in a few hours. The person then looked at our visa and asked why we were traveling today when we would not be allowed into Vietnam until Sept 16. We ended up spending the night back at the Oriental hotel since we knew the place in Bangkok.