Katherine Baird Ensembles provide several different string & string/flute combinations:

Duos:
Violin/cello duo
Flute/cello  duo 

String & Flute trio:
Violin, flute & cello

String Trios:
Violin, viola & cello
Two violins & cello

String Quartet:
Two violins, viola & cello

Various music styles are available:

Baroque, Classical, Jewish, Pop, 
Jazz Standards, Latin