saremo lieti di

we will be happy to

→ essere
phrase Rare #22,459
we will be happy to A polite, formal expression. The adjective changes according to the subject: lieto (masculine singular), lieta (feminine singular), lieti (masculine or mixed plural), and liete (feminine plural).
IT: Saremo lieti di aiutarti con la prenotazione.
EN: We will be happy to help you with the booking.

Saremo lieti di soddisfare la sua richiesta.

We will be happy to fulfill your request.

Saremo lieti di rivederla.

We will be happy to see you again.

— Il gattopardo (1963)

Saremo lieti di soddisfare la vostra richiesta.

We will be happy to accommodate your request.