[
  {
    "time": "13:43:47",
    "cmd": "hi",
    "response": "Hello! I am Marcus. How can I help you?",
    "duration_s": 0.0
  },
  {
    "time": "13:44:22",
    "cmd": "turn left",
    "response": "أدور لليسار",
    "duration_s": 10.3
  }
]