You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may i guide you?

USER: Due to medical emergency at home, I would like to cancel my existing reservation.

ASSISTANT: Sure, can I know your name?

USER: My name is Debra Clark.

ASSISTANT: I'm sorry Debra, there are no reservations with your name.

USER: That's fine.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your time.