SCAM. DO NOT BOOK. Report to your credit card company if they won’t refund for assistance. The airline air Portugal when I called said my flight confirmation number wasn’t valid and I would need to make any changes or cancellations via the agency (which would double the cost of the flight). This is a scam! When I said so they hung up on me. Beware. This company should be shut down. Reporting to Chase today for a refund so I can re-book via Expedia or the airline directly for a reliable company.