You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to cancel my recent reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Christine Lee.

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.