Hello.
user
Hello. How may I help you?
assistant
I would like to change my recent reservation because my trip dates are got postponed, can you help me?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
I am Larry Davis.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
That's ok, thank you for giving information.
user
Thank you for reaching us.
assistant