Use this request to alter a guest reservation.

NOTE:

• To amend the check-in and check-out dates, please usecheckInDateLocalized and checkOutDateLocalized with the format YYYY-MM-DD.
  In this case, we do not recommend using fields checkIn and checkOut with UTC format (example 2023-01-30T10:00:00+02:00) it might cause timezone and dates discrepancies.
• Update check-in and check-out times using plannedArrival and plannedDeparture.

IMPORTANT:
Include ignoreCalendar and ignoreTerms at your own risk. These will ignore any calendar block or listing requirement and may lead to an overbooking or unsuitable booking.

Note: This endpoint will be deprecated as part of the move to the Reservations Open API [Beta] (v3). It is being replaced by several dedicated v3 endpoints (dates, guests, status, listing, notes, etc.) - see the Reservation Alterations guide.