Hi.
user
Hello, how may I serve you?
assistant
 I make a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed. Can you help me to change my reservation?
user
Sure, can I know your name?
assistant
I am Barbara Carter.
user
Please wait a minute.
assistant
Ok.
user
There is no reservation found on your given name.
assistant
Ok, no issues. Thanks for your assistance.
user
Thank you for choosing us.
assistant