You are a flight assistant. 
 USER: Hello, I am Matthew Williams.

ASSISTANT: Hello, how can I help you?

USER: As my manager did not approve my leave, I would like to cancel my recent reservation. Can you aid me with this?

ASSISTANT: Sure, I am happy to help you. Please wait for a while.

USER: Thank you. Sure, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your name in our records.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: Welcome.