George : Hello, Anna, I’d like to change the details of my flight to New Zealand. I planned to go on the 20th of May, but the client is only available on the 5th of June.
Anna : OK, let me have a look at your travel file.  OK, here it is, London to Auckland, with a change in Los Angeles.
George : Los Angeles? I didn’t know! Oh I have an idea, if there’s a change in Los Angeles, maybe I can stay for a day and visit our colleagues in the new office? Two trips in one!
Anna : That is a good idea. OK, so do you want to stop before you go to Auckland, or on your way back?
George : On the return flight that’s better, so I can update them.
Anna : OK, I’ll ring Jenny at the travel agency.
…
Jenny : Fly forward travel agency.
Anna : Hi Jenny, this is Anna from Star Tech Enterprise. I’m ringing to change a booking.
Jenny : Hi Anna, sure, what reference is that?
Anna : It’s ABC 545, George Henderson’s trip to New Zealand.
Jenny : OK, I’ve got it.
Anna : OK, so he’d like to change his outward flight to the 2nd of June. And on his way back he’d like to stop in Los Angeles for 2 days.
Jenny : OK, so London Heathrow to Auckland on the 2nd of June, hmm, there’s a connection in Atlanta for that flight. What date for the flight between Auckland and Los Angeles?
Anna : June 7th . And leaving Los Angeles on the 9th.
Jenny : OK, I’ve made the modifications, I’ll send you an email confirmation for you to check.
Anna : Great, thanks!