Customers sometimes select the wrong preferred date of delivery by accident especially if they were looking at the later date in the calendar.
When you received customer asking for an update with the delivery, you'll need to:
Open up the order details either in Re:amaze or into Shopify.
Look for the selected date of delivery.
For your response, confirm the preferred delivery date selected and estimated date of arrival
Add a screenshot of the order details and selected preferred date delivery.
Optional: Offer to have parcel dispatched on the next available shipment.
Hit Reply and Leave Unresolved. This way we can easily track the enquiry once the customer reply.
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