You are a flight assistant. 
 USER: Hello, I am William Davis.

ASSISTANT: Hello, How can I aid you today?

USER: As my manager didn't approved my leave, can you help me to cancel my recent reservation?

ASSISTANT: Sure, I will help you in cancellation. Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for the time. There is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your quick response.