Fiesta is the third quartet from "Three Entertainments", light-hearted, descriptive vignettes originally for flute and guitar. "Fiesta" is, of course, of a Latin flavour - lots of sunshine and good humour. I imagine it describes a party with good food, dancing and much showing off. If it feels right to add a trill or a glissando, please do so.
Here is an excellent student performance on YouTube...
This performance by students at the Castellani Andriaccio Guitar Studios makes me happy...