Zeithaml (2002) examines that customer service is a key factor for accomplishment positive results in website. Website management should response expectation of customer in the best way possible. For example the expectation of customer can afford to complete transaction correctly, to have the product or service delivered on time, to obtain personalised attention,to have access to information and to have their emails answered quickly. This factor is related to service reliability, customer quickness, a personalised service and a fast reaction to complaints. According to Parasuraman et al. (1988) customer service include sensitivity (enthusiasm to help customers) and understanding (individual attention).
The subsequent SERVQUAL scale (Parasuraman et al. 1988) included sensitivity (willingness to help customers) and empathy dimensions (individual attention). Courtesy was relocated into the trust dimension of SERVQUAL. The other elements of this trust dimension were more closely linked to privacy and security, which has been shown to be a different dimension in the virtual context.