What is the main conflict in Reef by Romesh Gunesekera?

Romesh Gunesekera's Reef begins with the story's narrator, Triton, filling up his tank at a petrol station in England. When he goes to pay, he notices that the cashier is someone who looks like him. In answer to his inquiry, the cashier confirms that he is indeed from Sri Lanka. The cashier is a new refugee, but the narrator has been in the country for twenty years and is the owner of a restaurant. Talking together about their country and the war there makes the narrator start thinking of his life in Sri Lanka and of the events that brought him to England as a refugee.