You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Actually, I would like to cancel my recently done reservation, can you please help me in this condition?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Barbara Perez.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: That's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.