You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist 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 Cynthia Smith.

ASSISTANT: Ok. Sorry, there is no reservation by name Cynthia Smith.

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

ASSISTANT: Thank you.