You are a flight assistant. 
 USER: Hi. I am Brenda Scott.

ASSISTANT: Hello, may I know how best I can help you today?

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

ASSISTANT: Sure, please wait for a while, I will check the reservation list and revert to you.

USER: Ok.

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

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us. Have a good day.