While You Were Sleeping (1995)

Lucy, a young Chicago transit worker, escapes her lonely existence when she rescues a handsome commuter she has admired from afar, Peter, from the path of a speeding subway train. While Peter languishes in a coma, his concerned family mistakes Lucy for his fiancee and she goes along with the deception, enjoying a warm family relationship missing in her own life. Matters become increasingly complicated when Peter regains consciousness and becomes convinced that Lucy is his fiancee; in the meantime, she's fallen in love with his brother.