You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, may I know your name so that I can help you easily.

USER: Myself Andrew Lewis.

ASSISTANT: There is no reservation found on your name to cancel it.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, have a nice day Andrew Lewis.