Conversational Support Software Resources

Yes. You should set your business hours first and then create a trigger, both are under the Admin Center.

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Completely automating is not possible. You can create a good contact form where users chose specific topics and give all the infos to their problem that would be needed to solve the case. That way you can solve the problem the fastest way and with topics that are very specific but not personal you can just send out an automated answer with a trigger.