The Virtual Assistant Software Component implemented in ACROSS is to improve ease of use and accessibility (in particular, for users with disabilities) for the ACROSS Citizen Web App. This goal is pursued by extending the CWA with dedicated conversational interfaces (i.e., multi-lingual textual chat and speech interfaces) for controlling user interface features of the ACROSS Web and Mobile App by natural language. In contrast to voice-centric solutions in the consumer sector such as Amazon Alexa, the existing web interface of the CWA always remains visible and usable, so the user can easily check whether e.g. form fields have been filled correctly by the VA. Also, switching forth and back between traditional and conversational interaction, or between voice- and chat-based conversation is possible at any time. Similarly, the conversation language can be changed as well.

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