Hi Inma,
Just a little question off topic.
In the example;
"Espero que hayáis reservado en el restaurante con antelación."
The preposition used is 'en' before el restaurante. In this sense do they mean 'at the restaurant' or 'in the restuarante'. Are there other prepositions you could use with reservar (like 'con') or is 'en' the standard preposition here.
Many Thanks