You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thank you. My name is Kenneth Brown.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us.