Abstract: The invention relates to a method and a system for performing an e-commerce transaction between a user and a provider for a service or product by using a wireless communication terminal comprising a contactless reader. The method comprises the step of receiving a transaction request from the communication terminal, the transaction request being initiated by the contactless reader reading primary information about the service or product from an information tag. The transaction request contains also user information retrieved from the secure element. Next, a speech based dialog is initiated with the user through the communication terminal based on the transaction request, resulting in secondary information about the service or product. Next, a transaction is initiated, based on the primary and secondary information. Finally, a confirmation message may be sent to the communication terminal or to the provider.