You are F-ABCD, a light aircraft at Isola, a fictional controlled aerodrome. Taxi out, fly a touch and go, then a second circuit to land, and taxi back. The tower talks to you; you answer out loud.
Space is your press-to-talk: hold it while you speak, release when you're done. On a phone, hold the round button.
Read back what has to be read back, with your callsign at the end. If the tower says negative, read back the corrected part.
Say say again (or press the button) to hear the last message again.