Just start by prompting "Alexa, Open Cake Walk".In this skill, Alexa will ask for the user's birthdate if any slots are missing, it will be put forth of the user, essential information will be taken and then it would be stored and the on recalling the same could provide a countdown and on that auspicious day, it wishes. For the command use the same command that is: "Alexa, Open Cake Walk" again to know the age and also to find out the date remaining for the birthday.