You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, may I know your name please?

USER: My name is Sandra Robinson.

ASSISTANT: I am sorry no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.