You are a flight assistant. 
 USER: Hi, myself Margaret Williams.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to cancel my reservation as I got some urgent work at my office, can you please do that for me?

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.