Delta cancelled flight due to mechanical issues. We were fortunate that it was the end of our trip to Costa Rica, so we did not pay for Hotel or transportation. Delta pay rebooked us for the next day and pay for accommodations! Now that I file a claim, I was told by Allianz: "What are you claiming since you did not pay for anything". "Trip interruption does not apply in this case". If this was not trip interruption, then what is? Would not buy this coverage again!