I had made my reservation with an airline two months in advance. All of a sudden I realize that they have now changed the timings of my return flight. Infact they have preponed the timings by more than permissible duration as mentioned in their own policy. This has upset my entire plans and I am forced to cancel my trip. Shouldn't I be entitlled to get full refund for my cancellation for both my flights as it is in the same itinerary ?