AWS Lex Banking Chatbot tutorial - does not prompt for date of birth

Hi, I'm going through the Lex Banking Chatbot tutorial and am getting stuck on the third step, Configure the bot. Whenever I ask the bot for an account (I write 'savings' or 'checkings', it tells me outright the balance instead asking me for birthdate. I also noticed that I do not have a second possibility at the code hooks, 'Use a Lambda function for fulfillment', there's only 'Use a Lambda function for initialization and validation' so I had to select this one instead. I have a free trial version. Can anyone advise what to do, to get the not to prompt me about the date of birth?