You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Owing to an emergency, I need to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, please hold on for a moment.

USER: Ok.

ASSISTANT: I am sorry, there are no reservations with your name. Can I know your name?

USER: Ok, no problem. Thank you. I am Donna Martinez.

ASSISTANT: Thank you.