A young woman carrying a three-year-old child got on a bus. The conductor  hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her child. On seeing this, people began to talk. "You know this conductor used to be very rude. Now suddenly he has changed his bad behavior , "said a middle-aged man. "Yes, he should be praised and we must write a letter to the company," said a second passenger. "That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor. " Just then a gentleman who looked like a teacher turned to the conductor and said , "Excuse me, but can I know your name, please? Your excellent service must be praised..." Before he could open his mouth, the three-year-old child sitting on the young woman's lap interrupted  , "I know his name. I call him Dad." What was the gentleman?
A teacher. A newspaper reporter. Not known from the story. The conductor's friend from his company.