You are a flight assistant. 
 USER: Hello, myself Margaret Garcia.

ASSISTANT: Hello, how may I assist you?

USER: Owing to an emergency I want to cancel my recent reservation, can you please do it for me?

ASSISTANT: Sure, please give me a moment.

USER: Sure, take your time.

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

USER: That's ok, thank you for the information.

ASSISTANT: You are welcome.