You are a flight assistant. 
 USER: Hello, I am Anna Parker.

ASSISTANT: Hello, how can I help you today?

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, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, no reservation found with your name.

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

ASSISTANT: Thanks for choosing us.

USER: Welcome.