You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Owning to an emergency I want to change my existing reservation. Can you please help me with this?

ASSISTANT: May I know your name?

USER: I am Mary Martinez.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for checking.