Whatever format it must be in, what's important in that you must include interesting places in Melaka that yoh had visited(tipu2 je pun pe). Places like Kota A'Famosa and such. You can also write about how you felt; happy, interested, amazed, and much more. Also tell what made you feel that way. You need to write about how you feel towards those places and your hopes; do you wish to come again? And so, why?
I hope I helped you at least a bit. :)