Comfort Suites Portland Airport

We fly in from Hawaii, our flight delayed 3 hours, so we arrived at the hotel at 4am, the girl at the counter was walking towards outside and saw us entering the hotel with luggages without saying a word, we thought she was stepped out just a bit, and waited in the lobby, but she disappeared! There was another man in the lobby he tried to help us find her however no luck. We were so very tired and waited in the lobby for half an hour, she finally came in and gave us the key of the room, it only took like 2 minutes. If it were that simple, why not just handed the key to us upon our arrival, we tried to make phone calls, but the phone rang right in front of us in the counter with nobody inside, it's very very very frustrated.