If a customer with a reservation for a full-size car arrives to find only an Economy Car available, what should you do?

The most effective response in this situation is to contact another branch for assistance. When a customer arrives expecting a full-size car based on their reservation but only finds an Economy Car available, it indicates that there is an issue with inventory or fulfillment at the current location. By reaching out to another branch, you can explore options for fulfilling the customer's reservation as they expected, which might involve securing a full-size car from a nearby location.

This approach demonstrates a commitment to customer service and aims to resolve the issue efficiently, ensuring that the customer leaves satisfied. While upgrading for free or offering a discount are potential remedies, they do not directly address the customer’s original reservation. Suggesting they wait for availability also does not provide a proactive solution and may lead to further frustration. Therefore, contacting another branch serves as the best strategy to fulfill the customer's expectations and deliver a positive experience.