ABSTRACT Quality in tourism-related services, like in services in general, are basically about balancing customer perceptions and expectations. Successful service providers are able to meet and, whenever possible, exceed consumers' needs and wants. This way, it is possible to provide memorable experiences to visitors. In delivering services, due to certain specific characteristics of services (e.g., intangibility, simultaneity, variability and perishability), the human element, in particular the ‘face-to-face’ interaction with the customer, plays a fundamental role. The study stresses the contribution of interpersonal variables for the success of service organisations. It discusses how commitment to customer service, and supportive supervisors and co-workers, influence the relationship managers' ability to satisfy customers. The main findings were as follows: (i) commitment to customer service and co-workers' support have direct and positive effects on the ability to satisfy customers; (ii) commitment to customer service is the most important determinant of the ability to satisfy customers, and works as a mediator for the other independent variables; (iii) co-workers' support, having both direct and mediated effects, is a more important predictor than supervisors' support. The available data indicates that there is a need for specific training for supervisors, in order to increase their awareness of the impact of their performance on the service delivered by contact employees. Moreover, it is important that service organisations are capable of providing employees with a holistic view of the service delivery chain. This includes not only relationship managers, but also those who are not in direct contact with external customers. Apart from these training aspects, the results of this study should also be considered in relation to other management issues, namely in human resources management. Organisations should prevent the risk of losing those employees that show more commitment to customer service and more ability to satisfy customers. Employee retention exerts a positive impact on repurchase, which, in turn, influences profitability. In light of these findings, some managerial implications are suggested.