I am not really sure what you are asking, and I doubt this is a CRM issue. The duties are the same where ever an aircraft flies to. Customer service will undoubtably be one of the Captains considerations as it will the rest of the crews, however safety will always be paramount and there may well be many other factors that take precedence in a given situation. Once on the ground the arrangements regarding the passengers will be normally be sorted out between the operations department and the normal or nominated handling company.