Where is the headquarters of the airline which has the ICAO code of AAU?
CREATE TABLE table_15637071_1 (
    headquarters VARCHAR,
    icao VARCHAR
)
SELECT headquarters FROM table_15637071_1 WHERE icao = "AAU"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Where is the headquarters of the airline which has the ICAO code of AAU? ### Input: CREATE TABLE table_15637071_1 (
    headquarters VARCHAR,
    icao VARCHAR
) ### Response: SELECT headquarters FROM table_15637071_1 WHERE icao = "AAU"