You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Can you please assist me to cancel my reservation?

ASSISTANT: Ok, may I know your name to check with cancel?

USER: George Moore.

ASSISTANT: Ok, please allow me to check with availability.

USER: Ok.

ASSISTANT: Sorry, there is no reservation by your name.

USER: Thank you.

ASSISTANT: Thank you for choosing us.