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 with that?

ASSISTANT: Sure, may I know your good name?

USER: David Moore here.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.