I have a ticket with Alitalia miles JFK-LAX on Delta which I called in Alitalia to have it changed and they put in the new flights into the ressy and they said that there is no need to reissue just re-validate. Now on DL the ressy shows the new date but the ticket receipt still shows the old date. When I call DL they also say that the ticket still shows the old dates. When I call back Alitalia they say that on their end everything is fine. Am I good to go? Or I have to get Alitalia to reissue the ticket?