Hello.
user
Hello, how can I help you today?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, I am glad to help you. May I know your good name to proceed further?
assistant
I am Janet Bright.
user
There is no reservation found on your name in our database.
assistant
Ok, no problem. Thank you for your information.
user
Thank you for availing us.
assistant