You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Ok, my name is Christopher Allen.

ASSISTANT: Sorry, no reservation found on your name. Thank you for reaching us, have a nice day.

USER: No problem, thanks for checking.