Hello.
user
Hello. How can I help you today?
assistant
Can you help me to change dates in my existing reservation?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
Myself Raymond White.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
No issue, anyway thank you for checking.
user
Thank you for reaching us.
assistant