hi tinwolf ! welcome to the forum, in case no-one has said that yet.
to be honest, i'm not sure where you can get an ebook like that ; i guess you want some sort of phrase book ? maybe you can look at a french-english dictionary for a start ? i think there are several dictionaries available in mobipocket format but i don't know how be-book handles dictionaries... i don't know of any with mp3's added in although that would be a really great idea for travel guide ebooks !
you might want to search online as well for some common phrases ; i'm sure you could find a list with phonetic pronunciation, then at worst you can make your own personalised phrase book with the essentials you think you will need ! not a perfect solution, i know, but better than nothing i guess...
have a great time on your holiday ! where will you be stopping ?