You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency I need to cancel my reservation so, could you please help me with cancellation?

ASSISTANT: Sure, I am willing to help you. May I know your name please?

USER: My name is Margaret Walker.

ASSISTANT: Ok, wait a minute please.

USER: Ok.

ASSISTANT: Thanks for your name, sorry to say no reservation found with your name.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.