How to set Asynchronous time out in client application there called the Web Service of C#

Question

I made the HTTP service & host on IIS. Then add that service in a client applciation as a web reference. Called the publised function in client application asynchronously. THe calling function have following code: { Thread.Sleep(30000); return "Hi" }

Web config have following setting:
Used the above binding configuration in the end points. But no time out happened at service end. Please suggest what i do to get the time out in asynchronous method call.