You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in cancelling my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: I am Sandra Parker.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.