I have been sick in bed since motzei shabbos with a stomache virus. I am scheduled to fly TLV>LTN with U2 on Wednesday and LTN>DUB with FR & DUB>JFK with DL on Thursday. I don't feel up to flying. What can I do for a refund? P.S. I don't have DL status. The DL ticket was purchased from priceline as an AF codeshare.