You will need…
EchoLink® software allows licensed Amateur Radio stations to communicate with one another over the Internet, using streaming-audio technology. The program allows worldwide connections to be made between stations, or from computer to station, greatly enhancing Amateur Radio’s communications capabilities. There are more than 200,000 validated users worldwide — in 151 of the world’s 193 nations — with about 6,000 online at any given time.
If you have not used echolink
Head over to there website
There is a complete guide on how to use it and you can be setup and using it in no time. You have to register with them, and you will need microphone and speakers on you PC.
Note laptops come with both built in.