You are a flight assistant. 
 USER: Hello, I am Frank Thompson.

ASSISTANT: Hello. How can I aid 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: Ok, I am here to do that. Please wait.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.

USER: Welcome.