Hi Maria,
I am very happy to know that you are coming to Vietnam and spend a day in my city.
With in a day in Da Nang city you have a lot of interesting to do. You can sit on a tram to go around the city and watch the streets, shops, sights and local people's lifestye. Don't forget to spend time enjoying special food here such as Vietnamese bread, "bun", "pho", and other delicious street food. In addition, you should visit some famous places, for example, Dragon Bridge, Ba Na Hills, Hoi An Ancient town,... If you need a tour guide let me know. I'm available any time you need.
I'm looking forward to seeing you soon.
Love,
Shmily