We booked our flights with Crystal Travel nearly two months in advance and later confirmed our reservation in the airline booking system. Six days before our departure we got a call from the Crystal Travel agent informing us that our flights would have to be changed as the airline would not issue the ticket for that itinerary (he couldn’t explain why). Either we’d have to change our travel dates or pay extra to change airlines. After we spent nearly an hour on the phone, insisting we would not accept changing dates (we had accommodation booked) nor pay any extra money for flights we had booked months ago, the agent suddenly told us that miraculously, there had been no change after all and that he had received the message from the airline in error, or to another agent with his (clearly fake) name, or something to that effect (the story didn’t make much sense), and immediately issued us our e-tickets. I imagine what actually happened is he gave up and decided to find someone else to bump from the flight. Our flights worked out in the end but the stress of not knowing whether we actually had a flight booked until days before our departure was not worth it. I’d recommend booking with a larger, reputable agent or the airline itself.