You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Can I know your name?

USER: My name is Nicholas Davis.

ASSISTANT: Sorry, no reservation found by your name.

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

ASSISTANT: Thank you.