         clearTimeout timeout_id
         text = message.text
         if /yes|OK|read|done|はい|読んだ|読みました|オッケー/i.test text
-          response = "ありがとうございます。"
+          response = messages.pick("thank")
           self.unread = _.without self.unread, user
           self.read.push user
           self.save()

        return

      Circular.onDialogue = true
      robot.send {room: @room}, "#{@user} さん、お忙しいところ失礼します。" +
        "回覧板 No.#{@id} *#{@title}*は読まれましたか？ [yes/no/what]\n"

      # timeout for non-response from user
      timeout_id = setTimeout =>
        robot.send {room: @room}, "お返事がないので出直しますね。。"
        @breakRequest(user)
        callback.call()
        Circular.onDialogue = false

  # ---- response ----

  addCircular = (msg) ->
    msg.send messages.pick("new")

    # Dialogue start
    robot.emit "dialogue:start", msg.envelope.user, (message) ->
