Reservation does not change when contact is updated

[RunjiaChen]

Description

The reservation does not change when change the name of the person changes

Steps to reproduce

1. Launch the application for the first time to load initial data.
2. Add a contact into culinary
3. Make a reservation
4. Change the reservation

Expected behaviour

The reservation name should change alongside the edit

Actual behaviour

The reservation name does not change

Reason for severity

You have reservations for people that are not in the addressbook, i can now change every field pertaining to a contact, making it a completely different contact

Ideas

Perhaps there should be an update method called on the reservation whenever there is a change to contact details