Hi.
user
Hello, how may I aid you today from my end?
assistant
Myself Nancy Parker. I want to change my existing reservation, can you help me in that?
user
Sure, I am glad to help you out. Please allow me a moment.
assistant
Sure, I will wait for your response.
user
Sorry  Nancy Parker, there is no reservation on your name in our database.
assistant
That's ok, no problem. Thank you for the information.
user
Thank you for your reaching us.
assistant