You have 7 days from when the end user's message was sent from LINE to reply to the message.
Stickers are not supported.
Chat24Plus rich messages are automatically converted to LINE rich messages when possible; otherwise, they are removed from the message.
LINE conversations and messages are compatible with routing and queue.
Dialogflow is supported, including the following features: Human takeover, Chat24Plus rich messages, language detection, and chatbot language switcher.
Follow-up message is supported, but the delay setting is ignored; the message is sent instantly.
Offline message is supported, but the timetable is not sent.