Seats are not the whole story
A small family with stroller, luggage and shopping bags can need more vehicle space than a larger group travelling light. Share realistic bag estimates before the quote is confirmed.
Return pickup is part of the trip
Same-day return should be requested early. If you are not sure about the return time, say so instead of waiting until mall closing time.
Use one clear WhatsApp message
Include pickup, destination, date, time, return plan, passengers, child seat request, luggage, bags, stroller or wheelchair notes and preferred vehicle class.