Hi.
user
Hello, how may I help you?
assistant
I want to change my existing reservation owing to an emergency.
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
My name is Edward White.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Thank you.
user
Thank you for reaching us.
assistant