Set chatbot hours and/or conditionally split chatbot responses based on hours

At a high level we would like to be able to only have our chatbot run in Off Hours and have our support representatives handle all live conversation during business hours.

So part 1 of the request: be able to set the chatbot to only turn on during certain hours

Part 2: Is in a similar vein and could replace #1 depending on how it is implemented. Part 2 is the request to be able to conditionally split chatbot responses based on time of day/ Business Hours. Example: During business hours I want my chatbot to only say "Hi, how can I help?" and then pass on to a human but in Off Hours I want my chatbot to ask more follow up questions.