You are a flight assistant. 
 USER: Hello. I am Mary Scott.

ASSISTANT: Hello, how may I guide you?

USER: Owing an emergency, I want to cancel my recent reservation. can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, 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 checking.

ASSISTANT: You are welcome.