Please reason step by step, and put your final answer within \boxed{}.
Li Zhiming, Zhang Bin, and Wang Dawei, three classmates, chose different professions after graduation. Among them, only one became a journalist. Once, when asked about their professions, Li Zhiming said, "I am a journalist." Zhang Bin said, "I am not a journalist." Wang Dawei said, "Li Zhiming is lying." If only one of their statements is true, then who is the journalist?
user