KYIV, July 2 (Reuters) - Hungarian Prime Minister Viktor Orban said on Tuesday he wanted to improve ties with Ukraine and to sign a broad bilateral cooperation agreement. At a joint media briefing, President Volodymyr Zelenskiy said Tuesday's discussions between the two leaders in Kyiv could serve as a basis for a future agreement between Ukraine and Hungary. (Reporting by Anastasia Malenko, writing by Olena Harmash, editing by Timothy Heritage)