Dear John,
I am happy to hear that you will come to Vietnam next month. What a pity that you can only spend one day in Hanoi.
Hanoi is a famous tourist destination in Vietnam with a lot of interesting places to visit. However, within one day you should visit three places. One of the must-see places is the Temple of Literature. It is a great place for you to explore Vietnamese culture. Another place I would like to recommend is Hoan Kiem Lake. It is considered as one of the symbols in Hanoi. There you can admire the ancient beauty of Ngoc Son Temple. Finally, there is one place that you can't miss when you are in Hanoi is the Old Quarter. Walk around the Old Quarter is a great experience.
You can buy souvenirs for friends and family or explore the old house here. Let me know when you come so I can show you these places.
Look forward to seeing you soon.
Best wishes.
