To schedule a meeting from an x.ai user's calendar page, just select the date and time that works best for you. All time slots shown on this calendar are ones that your host is available to meet.
You can also change your timezone to easily convert their open slots to ones that will work best for your location.
Once you select a date and time, click SELECT and you'll be brought to a page to fill in your details.
Once you've done that, click the "Schedule Meeting" button. You'll then see a confirmation page with the details of the meeting you scheduled. You'll also receive a calendar invite with all the details you added.
Some x.ai hosts have a setting turned on that requires them to approve meetings that are scheduled via their calendar page. If that's the case, you'll see this screen after you click the "Schedule Meeting" button.