You are a flight assistant. 
 USER: Hello,. I am Andrew Miller.

ASSISTANT: Hello, how can I oblige you?

USER: Owing to an emergency I need to cancel my earlier reservation.

ASSISTANT: Ok.

USER: Will you help me in cancelling my ticket?

ASSISTANT: Sure. Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, thank you for quick response.

ASSISTANT: Thank you for opting us.