Hi we are from sri lanka..we are visiting Dubai...

Traveling to Seychelles does not require a prior tourist visa in order to enter it, and therefore you will not need to go to the Seychelles embassy or consulate in your country to apply for a tourist visa in order to visit it.
When you arrive in the Seychelles, you can get a stamp or entry permit at the airport, as this stamp is the arrival visa
After getting the Seychelles visit stamp on your passport, you will be able to stay in the country for 30 days or a whole month, knowing that you can also extend the period of stay by applying to the immigration department.
The following documents must be submitted:
A valid passport.
A return ticket to your home country or to any other country.
A confirmed reservation at a hotel or resort in the Seychelles.
For more information and inquiries, you can visit the following link:
Tourism in Seychelles