1. The businessman: “Are you going to Russia on Friday?”
The businessman said if i was going to Russia on Friday
2. Matt said, “One day I’ll go on holiday to Rome.”
Matt said One day he would go on holiday to Rome
3. The scientist: “Did you understand the experiment?”
The scientist asked if I  understood  the experiment
4. “Where did you go last night?” she said to her boyfriend.
She asked her boyfriend Where you went the previous night