You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you from my end?

USER: Yes, there is a concern regarding the flight cancellation because my event manager has cancelled the contract, so I want to cancel the flight. Is it possible?

ASSISTANT: Sure, I regret to help you as per your concern.

USER: Ok, that is good to hear a positive response from you.

ASSISTANT: May I know your name to check the previous reservation on your name?

USER: Yes, I had reserved on the name Margaret Green.

ASSISTANT: Sorry Green, there is no active reservation on your name in our reservation list.

USER: Ok, may be my event manager had cancel behalf of me. Anyway thank you for the information.

ASSISTANT: That's ok, check your email about this concern. Thank you for reaching us.