Hello.
user
Hello, how can I aid you today?
assistant
I want to change my existing reservation. Could you help me with that?
user
Sure, I am here to help you. May I know on whose name the ticket has been reserved formerly?
assistant
Barbara Walker.
user
Ok, hold on for a moment. Let me check.
assistant
Ok.
user
Sorry Barbara Walker, there are no flights reserved on your given name formerly.
assistant
That's ok, no problem. Thank you.
user
Welcome, thank you for choosing us. Have a great day.
assistant