This thesis is about the development of a Robotic User Interface for an autonomous service robot operating in an airport environment. The final purpose was to create an interface beautifully designed and, at the same time, intuitive for the end-user in order to create of facing with a familiar UI, even for the first time. For this reason, an Android-based tablet has been chosen for developing the interface, by following material design guidelines for the domain of graphics. The second area that has been treated in this thesis involves the development of a speech recognition algorithm for the implementation of a one-click interface able to minimize the number of steps necessary to perform an action and creating a natural Human-Robot interaction.