Papers by Hanwen Du
Planning with Diffusion Models for Target-Oriented Dialogue Systems (2025.acl-long)
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| Challenge: | Existing methods for directing conversations toward specific targets generate dialogue plans in a step-by-step sequential manner and suffer from compounding errors and myopic actions. |
| Approach: | They propose a framework that leverages diffusion models to enable non-sequential dialogue planning. |
| Outcome: | The proposed framework performs non-myopic lookahead exploration and optimizes action strategies over a long horizon through non-sequential dialogue planning. |
SAPIENT: Mastering Multi-turn Conversational Recommendation with Strategic Planning and Monte Carlo Tree Search (2025.naacl-long)
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| Challenge: | Existing methods train RL-based agents with greedy action selection or sampling strategy and suffer from suboptimal conversational planning. |
| Approach: | They propose a Monte Carlo Tree Search-based CRS framework called SAPIENT . it consists of a conversational agent and a communication planner . |
| Outcome: | The proposed framework outperforms the state-of-the-art methods on four benchmark datasets. |