[
  {
    "message_id": "M-7001",
    "customer_id": "C-3101",
    "sent_at": "2026-10-01T21:14:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "Hi! I'm planning double eyelid surgery. I arrive in Seoul on Oct 8."
  },
  {
    "message_id": "M-7002",
    "customer_id": "C-3101",
    "sent_at": "2026-10-02T10:03:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "Also, I fly back on Oct 15, so please book everything before that."
  },
  {
    "message_id": "M-7003",
    "customer_id": "C-3101",
    "sent_at": "2026-10-02T10:20:00+09:00",
    "channel": "LINE",
    "sender": "coordinator",
    "text": "Got it, Mei! Surgery on Oct 12 at 2 PM and the skin booster on Oct 9 at 3 PM."
  },
  {
    "message_id": "M-7004",
    "customer_id": "C-3102",
    "sent_at": "2026-10-03T13:40:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "10月10日 21:40着の便で行きます。翌日の午前中に施術できますか？"
  },
  {
    "message_id": "M-7005",
    "customer_id": "C-3102",
    "sent_at": "2026-10-06T08:12:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "すみません、便が変わって10月11日 13:20着になりました。帰国は10月14日のままです。"
  },
  {
    "message_id": "M-7006",
    "customer_id": "C-3103",
    "sent_at": "2026-10-02T16:25:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "ถึงโซล 9 ต.ค. 07:40 ค่ะ"
  },
  {
    "message_id": "M-7007",
    "customer_id": "C-3103",
    "sent_at": "2026-10-02T16:26:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "กลับไทย 14 ต.ค. ค่ะ อยากทำโบท็อกซ์กับเลเซอร์วันเดียวกัน"
  },
  {
    "message_id": "M-7008",
    "customer_id": "C-3104",
    "sent_at": "2026-10-04T23:02:00+09:00",
    "channel": "WhatsApp",
    "sender": "customer",
    "text": "I'll land next Friday morning and leave the Sunday after."
  },
  {
    "message_id": "M-7009",
    "customer_id": "C-3104",
    "sent_at": "2026-10-05T09:15:00+09:00",
    "channel": "WhatsApp",
    "sender": "customer",
    "text": "Could I do laser toning the day after I land?"
  },
  {
    "message_id": "M-7010",
    "customer_id": "C-3104",
    "sent_at": "2026-10-05T09:31:00+09:00",
    "channel": "WhatsApp",
    "sender": "coordinator",
    "text": "Sure! Could you send me your flight dates when you have them?"
  },
  {
    "message_id": "M-7011",
    "customer_id": "C-3105",
    "sent_at": "2026-10-03T19:48:00+09:00",
    "channel": "WeChat",
    "sender": "customer",
    "text": "我10月7日上午到仁川，10月13日回国。"
  },
  {
    "message_id": "M-7012",
    "customer_id": "C-3106",
    "sent_at": "2026-10-04T12:30:00+09:00",
    "channel": "LINE",
    "sender": "customer",
    "text": "10月9日 11:05着、10月16日 18:30発です。"
  }
]