Help! I saw this movie on TV in the 70s or 80s. I don't know who the actors are: A man flirts with a stewardess. Later he is transported to a parallel world. Here he has a neglected wife who looks exactly like the stewardess. He makes amends and convinces her he loves her. Later she is dying of a disease that could have been treated if she had known about it earlier. The man is bounced back to his original world. Now he realizes that the stewardess is his true love, that she must have the same disease, and that he must find her while there is still time to treat it.