Hello, Dolly! is a big brassy star vehicle with a hit title song. The libretto is based on a play by Thornton Wilder which lifted generously from French and Austrian farces. Though Dolly is a matchmaker the story isn't necessarily a romance.
Dolly, Horace and Irene have each survived a spouse and settled into unfulfilling lives. Dolly decides to let her memories go and "rejoin the human race." She learns to like herself again and teaches the others to do the same.