book paid slots on calendly

hello
i created a home care catalog
the customer chooses an option (which will feed the price variable of stripe)
But before paying he must book a slot on integrated calendly
the problem is that the slot is validated with sending of confirmation by calendly before he has paid
is there a way to leave pending the time to verify the payment?
i would like to do it in this way because paying before seeing the available slots is less cool for the customer.