перевидите на англ , в обычную речь , в косвенную :
он сказал: я только что получил письмо от своего дяди
он сказал : я собираюсь в театр
он сказал : я уверен она позвонит мне

He said: " I have just got a letter from my dad."

He said that he had just got a letter from his dad.

He said:" I am going to the theatre."

He said that he was going to the theatre.

He said: "I am sure she will call me."

He said that he was sure she would call him.