Channel Specific Response - Facebook format - Quick Replies

Hi,

I’m trying to write a channel specific response for custom Buttons on Facebook using templates:

I followed the documentation here:

  utter_ask_pick_color:
  - text: Which color would you like?
    channel: facebook
    custom: 
      - '{"messaging_type": "RESPONSE",
      "message":{
        "text": "Pick a color:",
        "quick_replies":[
          {
            "content_type":"text",
            "title":"red",
            "payload":"red"},
          {
            "content_type":"text",
            "title":"white",
            "payload":"white"}
          ]
        }'
  - text: Which color would you like
    buttons:
    - title: white
      payload: white
    - title: red
      payload: red

The suggested payload by Facebook is given here:

https://developers.facebook.com/docs/messenger-platform/send-messages/quick-replies

Facebook isn’t displaying the options its just displaying the text field.

Can someone please point out what mistake am I making.

Thanks!