Hello.
user
Hello, how can I aid you today?
assistant
I would like to change my existing reservation. Can you help me?
user
We are glad to assist you in that. May I Know your name for proceeding further?
assistant
My name is Rebecca Phillips.
user
Sorry Rebecca Phillips, we haven't found any previous flight reservation based on your name.
assistant
No issue, thank you for your time.
user
Thanks for reaching us.
assistant