In this example, you Mahan Air flight number 215 and Made from Tehran to Mashhad Airport
Literature is the most important condition so The pilot and the control tower conversations with Sentences look likes:good Morning،good afternoon and ....

pilot: mehrabad ground good morning IRM215

ground: IRM 215good morning mehrabad ground

or

ground: IRM 215 go ahead



pilot: mehrabad ground request startup and push back IRM 215


ground: IRM215 startup and push back is approved
or
ground: IRM215you are clear for startup and push back


pilot: start up and push back is approved IRM215
or
pilot: clear for startup and push back IRM215

important note:the answer of pilot to the control tower called read back
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