Certainly! Here are the sentences converted into reported speech:

1) John said, “I want to attend a famous university.”
→ John said that he wanted to attend a famous university.

2) “I’m looking for the book you gave me last week,” Mary said to Peter.
→ Mary told Peter that she was looking for the book he had given her the previous week.

3) Alfred said to John, “I did not promise to send you a telegram.”
→ Alfred told John that he had not promised to send him a telegram.

4) "I will get myself a drink," she said.
→ She said that she would get herself a drink.

5) "I cannot drive them home," he said.
→ He said that he could not drive them home.

6) "Peter, do you prefer tea or coffee?" she said.
→ She asked Peter if he preferred tea or coffee.

7) "The film began at seven o'clock," he said.
→ He said that the film had begun at seven o'clock.

8) The father said, “I was on a business trip the whole day yesterday.”
→ The father said that he had been on a business trip the whole day the previous day.

9) “My brother will get married next month,” James said.
→ James said that his brother would get married the following month.

10) Henry said to his mother, “Come and spend a week with us.”
→ Henry told his mother to come and spend a week with them.

11) He said to me, “Keep a seat for me in the lecture hall.”
→ He asked me to keep a seat for him in the lecture hall.

12) Mike said to Henry, “Give me my book back, please.”
→ Mike asked Henry to give him his book back.

13) "Don't play on the grass, boys," she said.
→ She told the boys not to play on the grass.

14) He said, "Don't go too far."
→ He told her not to go too far.

15) "Don't make so much noise," he said.
→ He told them not to make so much noise.

16) The mother said to her son, “Don’t move, please.”
→ The mother asked her son not to move.

17) My sister said to me, “Don’t open the window.”
→ My sister told me not to open the window.

18) Jane said to Williams, “Will you be free tomorrow?”
→ Jane asked Williams if he would be free the next day.

19) Fred asked the postman, “Are there any letters today?”
→ Fred asked the postman if there were any letters that day.

20) Richard asked the Browns, “What are you going to enter?”
→ Richard asked the Browns what they were going to enter.

21) "I was very tired," she said.
→ She said that she had been very tired.

22) "Be careful, Ben," she said.
→ She told Ben to be careful.

23) "I will get myself a drink," she says.
→ She says that she will get herself a drink.

24) "Why haven't you phoned me?" he asked me.
→ He wondered why I hadn't phoned him.

25) "I cannot drive them home," he said.
→ He said that he could not drive them home.

26) "Peter, do you prefer tea or coffee?" she says.
→ She asks Peter if he prefers tea or coffee.

27) "Where did you spend your holidays last year?" she asked me.
→ She asked me where I had spent my holidays the previous year.

28) He said, "Don't go too far."
→ He advised her not to go too far.

29) "Have you been shopping?" he asked us.
→ He wanted to know if we had been shopping.

30) "Don't make so much noise," he says.
→ He asks us not to make so much noise.