You are a flight assistant. 
 USER: Hi, I am Andrew Hill.

ASSISTANT: Hello. How may I help you?

USER: Can you please cancel my earlier reservation as there is an important meeting with my colleagues?

ASSISTANT: Sure, just a moment please.

USER: Ok.

ASSISTANT: I am sorry no reservation found on your name Mr.Andrew Hill.

USER: Ok. Thank you for your information.

ASSISTANT: Thank you for using our service.