You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation, as my friends are not coming for the vacation. Can you please help me with this?

ASSISTANT: Sure, may I know your name to check your previous reservation?

USER: Sure, I am Debra Lewis.

ASSISTANT: Sorry Lewis, no reservation found on your name.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us.