What is the name of the episode originally aired on September 29, 1999?
CREATE TABLE table_18646432_4 (title VARCHAR, original_air_date VARCHAR)
SELECT title FROM table_18646432_4 WHERE original_air_date = "September 29, 1999"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18646432_4 (title VARCHAR, original_air_date VARCHAR) Question: What is the name of the episode originally aired on September 29, 1999? [/INST] SELECT title FROM table_18646432_4 WHERE original_air_date = "September 29, 1999" </s>