Hello, myself Michael Roberts.
user
Hello, how may I assist you for the day?
assistant
I want to change my origin airport code in my existing reservation, can you please help me out?
user
Michael Roberts, let me check with your previous booking.
assistant
Sure, take your time.
user
Sorry to inform you, there is no reservation found by your name.
assistant
That's ok, thank you for the information.
user
Thank you for approaching our services.
assistant