You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, may I know your name?

USER: I am Margaret Miller.

ASSISTANT: Sorry to inform no reservation found with your name. Thanks for reaching us, have a good day.

USER: Ok, thank you.