Front Office → Reservations → Room Reservation
Choose the reservation you want to modify: In the name is the option guest by typing it will open the modification screen, and you will be able to modify and even change the name holder of the reservation.
If the guest is checking in, go to Front Office → Reception → Register Guest or group
Choose the reservation to be checked in → confirm room assignment
On the screen you will have the guest module, and the guest information option will appear, it is the same screen to make a reservation, and you will be able to modify the guest information including changing the name of the owner.
To Modify Guest that is already in Hotel
Front office → Reception → Modify Registration
Search for the guest you wish to modify in the Front Office module, it will give the option of the holder or companion, enter the one you wish to modify, and the same screen will appear to make a reservation, and you will be able to modify the guest information and even change the name of the holder.