You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Anthony Lee. I would like to cancel my reservation as I have my sister's marriage, can you please help me out?

ASSISTANT: Yes, I am happy to guide in that cancelling.

USER: Thank you.

ASSISTANT: Just wait for a while.

USER: Sure.

ASSISTANT: When I checked in our booking list there is no ticket done on your name to cancel it.

USER: Ok no problem, thank you for your services.

ASSISTANT: Most welcome.