Hello.
user
Hello, how may I aid you?
assistant
My name is Kevin White, can you please help me in  changing my existing reservation details?
user
Sure, please wait a moment I will check your details and proceed further.
assistant
Ok, take your time.
user
Sorry to say, there is no reservation on your name in my database.
assistant
That's ok, thank you for the information.
user
Thank you for reaching us, have a nice day.
assistant