What does "to reserve a seat" mean in English for Spanish?

In English for Spanish, "to reserve a seat" means:

reservar un asiento

Listen to "to reserve a seat": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 3, Level 3, Scene 7