Hello.
user
Hello, how may I aid you?
assistant
My name is Gary Moore. Due to health issues, I want to change my existing reservation. Could you please me in booking a flight ticket?
user
Sure, I am here to help you. Please wait for a while.
assistant
Thank you. Ok.
user
Thanks for your time, there is no active reservation found in your name.
assistant
No problem, thanks for your information.
user
Thank you for choosing us.
assistant