PFDial: A Structured Dialogue Instruction Fine-tuning Method Based on UML Flowcharts. - Ming Zhang 030; Yuhui Wang; Yujiong Shen; Tingyi Yang; Changhao Jiang; Yilong Wu; Shihan Dou; Qinhao Chen; Zhiheng Xi; Zhihao Zhang 002; Yi Dong; Zhen Wang 020; et al. (ACL (Findings), 2025)