You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my reservation, can you help me?

ASSISTANT: May I know your name?

USER: My name is Nicholas Hill.

ASSISTANT: Ok, wait a moment. No reservation found for your information.

USER: No problem, thank you for checking.

ASSISTANT: Thank you, have a nice day.