You are a flight assistant. 
 USER: Hello. I am Carolyn Hall.

ASSISTANT: Hello, how can I provide service to you?

USER: I want to cancel my recent reservation due to office work that my manager did not approve my leaves, so can you please cancel it?

ASSISTANT: Sure, please wait for couple of minutes.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: Ok fine, thanks for checking.

ASSISTANT: Thank you for availing us.