Hi sorry if this is a noob question, I have set up my agent in VAPI to make a function that posts customer information to a webhook but I wanted to know if anyone has a guide or tutorial on how to get the assistant to recommend 2 or 3 time slots available on my google calendar, I.E. "hi i want to book an appointment" ; "ok we have 4/20, 4/21, and 4/23 available - which one works best for you"? I'm new to all this so I wanted to see if anyone was able to point me in the right direction. Thank you so much in advance :-).