The piece which you refer to is the 3rd part of "Suite de trois
morceaux for Flute and Piano", Op. 116 (1890), by Benjamin Godard,
a French composer.  The music arrangement for Lange Gavioli was 
done by Tom Meijer.

Jan Kees de Ruijter
Netherlands

 [ An enjoyable flute and piano performance is at
 [ https://www.youtube.com/watch?v=zZ7KoaLOnJY
 
 [ The waltz begins at time 6:55  -- Robbie