Update app.py

app.py

@@ -26,8 +26,8 @@ def greet_json():
 
 @app.get("/get_flights")
 async def get_flights(
-    origin: string ="CGK",
-    destination: string ="DPS",
+    origin: str = "CGK",
+    destination: str ="DPS",
     adult: int = 1,
     child: int = 0,
     infant: int = 0,