I lost my mobile iphone today , EMIE number is: 0132710044522837, how to trace or block this phone. Model : 4S?

I boarded the Mega cab (01141414141) from International Airport Delhi to Sheikh Sarai today at 3^rd March 2013 Time 02:04am & dropped me at 02:40 am.

The cab driver was Mr.Manoj , tel no :8800758120 cab number : DLIRX 3482.

I took all my baggage from the cab and my phone was very much on the sit ..

I already paid the cab driver and after taking the baggage the cab driver immediately drived the vehicle and the cell phone remained inside the cab

I called up immediately but the cab driver neither picked up the phone nor he replied.

How to trace my mobile.