You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Debra Roberts.

ASSISTANT: How can I help you out today?

USER: Owing an emergency, I want to cancel my recent reservation. Can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for accepting my request.

ASSISTANT: Sorry Roberts, there is no reservation found on your name to cancel your reservation.

USER: It's ok, thank you for checking.

ASSISTANT: Welcome Roberts. Thank you for using our services, hope you can reach us in future.