Hello.
user
Hello, how may I help you?
assistant
 I made a reservation earlier in the wrong date unknowingly. So, I want to change my existing reservation. Can you please help me with this?
user
Sure, can I know your name?
assistant
My name is Betty Campbell.
user
Please wait for a moment to check your details.
assistant
Sure, take your time.
user
Sorry to say, no reservation found on your name.
assistant
It's ok, thank you.
user
Thank you for reaching us.
assistant