Final answer:
Oliver shows responsiveness and a commitment to customer service when dealing with questions he can't immediately answer, by promising to promptly find the information from reliable sources.
Step-by-step explanation:
Oliver demonstrates responsiveness and commitment to customer service in how he serves customers. When faced with imperfect information, a seller can reassure a buyer by being transparent about what they do not know, committing to finding accurate information, and demonstrating a willingness to go the extra mile to ensure customer satisfaction. Sellers can also reassure buyers by providing additional resources and information, such as directing them to manufacturer's product sites or offering personal reassurances based on past customer experiences and product track records.