How can I test a http request in JMeter when the service is not available

I am trying to test a http request but the service is not available, is there a way to create a dummy response in JMeter? The purpose of this is to test the request that is actually being sent

The dummy sampler has been recommended however, if another tester has not got this plugin then they will not be able to test it. Is there another sampler or tool already built-in that can be used?