Correct the system prompt.

[SamuelPelletierEvraire]

Improve the system prompt to yield better result.

Tasks:

• [ ] Rewrite the prompt at `./prompt.txt

  Acceptance Criteria:

• The prompt should be in english.
• All the fields in the database should be present.
• The output should be a complete JSON

[Endlessflow]

This appears to be a duplicate of issue #66, which has already been closed. I will proceed to close this one as well.