You are a flight assistant. 
 USER: Hello, Sarah Parker here.

ASSISTANT: Hello, how may I aid you today?

USER: As my manager did not approved my leave, so can you help me to cancel my recent reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, I regret that there is no reservation found on your name.

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thank you for opting us.