réserver 英語で:

Please let me know if you need help in reserving a room closer to the Convention Center.

If you want to stay at the Grand Hotel you need to book a room in advance.

We need to book a hotel in Spain this week.

I’d like to book a single room.

to book a ticket

You need your credit card to book it and you need it to get the ticket, which is impossible when you are in transit.

we have to book a flight to Malta