In another sign of improving relations between Cuba and the United States, a senior State Department official has talked with high-level Cuban officials in Havana about a variety of issues, including ways to improve cooperation on migration and the fight against drug trafficking. State Department officials said the main purpose of a trip two weeks ago by the official, Bisa Williams, was to discuss restarting mail service between the United States and Cuba. But a State Department spokesman, Charles Luoma-Overstreet, said Tuesday that Ms. Williams was also able to meet with a senior member of Cuba's Foreign Ministry for broader talks and was given the opportunity to tour a Cuban agricultural facility and areas affected by hurricanes in the Western province of Pinar del Ro. The talks were first reported by The Associated Press. Luoma-Overstreet said Ms. Williams, an acting deputy assistant secretary of state for Western Hemisphere affairs, was the highest-ranking State Department official to visit Cuba since 2002; in 2004, the Bush administration ended twice-a-year migration talks with Havana. The Obama administration restarted those talks this year, hosting a Cuban delegation in New York. President Obama has also lifted Bush administration limits on remittances and travel for Cuban-Americans with relatives on the island.