book in
US /bʊk ɪn/
UK /bʊk ɪn/

1.
2.
registrar, apuntar
to officially record someone's name as a visitor or for an appointment
:
•
The receptionist will book you in when you arrive.
La recepcionista le registrará cuando llegue.
•
Make sure to book in with the doctor's office for your annual check-up.
Asegúrate de reservar una cita con el consultorio del médico para tu chequeo anual.