Hello.
Hello. How can I guide you now?
Due to sudden work, I want to change my reservation.  Can you please help me with it?
Sure, I can assist you and on whose name your flight ticket booking is done previously?
Daniel White here.
Wait for a moment.
Ok.
Thank you for your patience, I am unable to search your previous booking in our data base to change your booking.
Ok, not an issue. Thank you.
Your are most welcome and thank you for approaching us.