First, read what is on the cake.
Okay so this is how I imagine this conversation went:
Walmart Employee: 'Hello 'dis Walmarts, how can I help you?'
Customer: 'Yes, I would like to order a cake for a going away party this week.'
Walmart Employee: 'Whachu want on da cake?'
Customer: 'Best Wishes Suzanne.' And underneath that, 'We will miss you'.