title: Dialogflow CX - How to clear parameter
body: <p><a href="https://i.stack.imgur.com/uq9Yv.png" rel="nofollow noreferrer">https://i.stack.imgur.com/uq9Yv.png</a></p>
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  <p>How do I get 'number' parameter to clear and output the prompt 'say a number' when I say 'no'?</p>