I am trying to prompt an LLM model to extract two dates from a long message. I need help coming up with a prompt that will make the task clear to the model.  Here is what I have so far, I'd like you to suggest ways to improve it please:

    prompt = f"""Determine the rollout date and completion date of the event described in the given message below. 
Most of the time the dates will be under a header that looks something like: '[when will this happen:]'. 
Your answer should be formatted as JSON. ONLY RETURN THIS JSON. It must be in this format:

{json.dumps(date_json)}

Dates should always be formatted in MM/DD/YYYY format, unless you cannot determine one, in which case use 'Unknown'.

If there is no specific day given, as in 'we will begin rolling out in october 2023', just use the first day of the month for the day, so your 
answer would be 10/01/2023.
If you cannot determine a value for 'rollout_date' or 'completion_date', use the value 'Unknown'.
    
Message (delimited by triple quotes):\n\n\"\"\"\n{msg}\n\"\"\" 
"""