If you don't mention a time frame in your request, Amy and Andrew will schedule the meeting as soon as your availability allows, while still building in some time to get confirmations from everyone. By default, this will usually be 2 or 3 days from the date you sent in the meeting request, although this can vary depending on how much availability is on your calendar.
If you do have an urgent meeting and want it to take place sooner, you can just let them know; then they’ll look for your soonest availability within the timeframe provided. Like this
“Andrew, please schedule a call today or tomorrow.”
“Amy, please find a time for us before the end of the week.”