You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello, I am Anthony Miller.

ASSISTANT: How may I assist you?

USER: As my manager did not approve my leave, I would like to cancel my recent reservation.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for your time, there is no reservation found with your name to cancel it.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome Anthony Miller.