You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my reservation due to some personal work at Office, so please help me.

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Ok, May I know your name?

USER: Sure, I am Margaret Lee.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thank you for being patient, There was no reservation found on your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us.