Hello.
user
Hello. How may I guide you?
assistant
I am Dorothy Green. I would like to change my existing flight reservation. Could you please help?
user
Sure, please hold on for a moment, let me check.
assistant
Ok, take your time.
user
I am sorry, there are no reservations with your name?
assistant
Ok, no problem. Thank you for the information.
user
Thank you, have a good day.
assistant