Ticket

{
    "_id": "string",
    "subject": "string",
    "category": "string",
    "priority": "low",
    "status": "open",
    "messages": [
        {
            "role": "user",
            "content": "string",
            "createdAt": "2019-08-24T14:15:22.123Z"
        }
    ],
    "createdAt": "2019-08-24T14:15:22.123Z"
}