Select the option that expresses the given sentence in direct speech.

Q:

He asked me when I had booked the flight tickets.

• 1
  He said to me, “When you had book the flight tickets?”
• 2
  He said to me, “When did you book the flight tickets?”
• 3
  He said to me, “When are you booking the flight tickets?”
• 4
  He said to me, “When do you book the flight tickets?”