Hotel booking process design & usability

5.2.1.2 What design options are available to address these problems?
OPTION #1 - Inform users that they may only make one reservation at a time 
One design option is to suggest that users perform two or three full reservation cycles if they 

want to make reservations that cannot be handled by the existing design.

For example, figure 6 below shows the message that appears on the Hilton.com website when
the user wants to book an unequal number of people in each room.
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Figure 6: Message to users on the Hilton.com website 

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Hotel booking process design & usability 
Travel UCD – February 2003 
Although the best solution would be to handle all combinations of multi-room reservations, this
simple help box, positioned next to the room and guest number entry, would assist users. It stops
them hunting for a solution to their problem and advises the appropriate way out.
Another solution may be to put a message next to the guest entry box itself, to minimise the risk
that users become confused about how to complete their reservation.
OPTION #2 – Loop through available rooms in a single hotel 
An example website that handles multi-room reservations in this manner is accorhotels.com.
Once a user has added a room to their reservation selection, they have the option to return to the
list of rates / rooms available in a particular hotel (screen 3 in figure 3). They can then add a
further room to the reservation ‘shopping basket’.
This looping process carries on until all the required rooms have been added.
In the usability test, two of the 12 users failed to understand how to add the second room to the
reservation, so this option is not foolproof.