You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Carter.

ASSISTANT: How can I help you?

USER: I want to cancel my reservation due to my conference has been postponed. Help me for my ticket cancellation.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok, thanks for providing information.

ASSISTANT: Thank you for approaching us.