How to prepare training data for OpenAI

Question

I am trying to train a model in Open AI. However the training data is not working.

Example - "Set an interview for 15th August 2023."

I should be getting a JSON response like below.

{
  "intent": "schedule_interview",
  "entities": [
    {
      "entity": "Person",
      "value": "Arnab"
    },
    {
      "entity": "Date",
      "value": "08/15/2023"
    }
  ]
}

Please suggest how to do I prepare the training data in JSONL format with prompt and completion.