There were two staff members at the front desk, both foreigners (probably Vietnamese), and even though I had made a reservation, I was made to wait 5 minutes for them to search (confirm) my reservation.
In the end, I was told that it had been canceled, so I asked them to confirm it again, and they made me wait 15 minutes for the confirmation process, and in the end, my reservation was confirmed. In the end, I was made to wait about 30 minutes for the confirmation, and there was no apology even though it was the front desk's mistake.
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