You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I support you?

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

ASSISTANT: May I know your name please?

USER: I am Ruth Nelson.

ASSISTANT: There is no reservation found with your given name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for opting us.