You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Hill.

ASSISTANT: How can I assist you now?

USER: I am planning to cancel my reservation, can you please help me out?

ASSISTANT: Sure, I will help you with that. Sorry Sarah, there is no reservation found on your name.

USER: That's fine.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you.