I am a first year PhD student at Edlab @KAIST AI, advised by Edward Choi. I am interested in natural language processing, machine learning for healthcare, and conversational agents.

Topics of interest

AI Agents, Dialog Systems, Text-to-SQL, Machine Learning for Healthcare

Current Projects

1. Can AI Chatbots Mimic Human Behaviors in Group Chat Settings and Fool Humans? [project app link]

2. Evaluating Persona Consistency of "persona-fied" AI Agents by Leveraging the Approvals System in Baldur's Gate 3 [github link]

Publications

2025

SCARE: A Benchmark for SQL Correction and Question Answerability Classification for Reliable EHR Question Answering

Gyubok Lee*, Woosog Chay*, Edward Choi (*: Equal Contribution)

Proc. of Machine Learning for Health (ML4H)

Under Review

DialSim: A Real-Time Simulator for Evaluating Long-Term Dialogue Understanding of Conversational Agents

Jiho Kim, Woosog Chay, Hyeonji Hwang, Daeun Kyung, Hyunseung Chung, Eunbyeol Cho, Yohan Jo, Edward Choi 

ProPerSim: Developing Proactive and Personalized AI Assistants through User-Assistant Simulation

Jiho Kim, Junseong Choi, Woosog Chay, Daeun Kyung, Yeonsu Kwon, Yohan Jo, Edward Choi

From Conversation to Query Execution: Benchmarking User and Tool Interactions for EHR Database Agents

Gyubok Lee, Woosog Chay, Heeyoung Kwak, Yeong Hwa Kim, Haanju Yoo, Oksoon Jeong, Meong Hi Son, Edward Choi

Preprints

TrustSQL: Benchmarking Text-to-SQL Reliability with Penalty-Based Scoring

Gyubok Lee, Woosog Chay, Seonhee Cho, Edward Choi

Preprint

Education

• PhD Candidate, Kim JaeChul Graduate School of AI, KAIST, Sept. 2025 ~ Present

• M.S., KimJaeChul Graduate School of AI, KAIST, Aug. 2023 - Aug. 2025

• B.S. in Electrical Engineering, KAIST, Mar. 2018 - Feb. 2022