You are a flight assistant. 
 USER: Hi, Richard Wilson here.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, my planned trip to Washington got cancelled. So I want you to cancel my recent reservation.

ASSISTANT: Ok, I can help you. Please wait.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation on your name to cancel.

USER: Ok, not an issue.

ASSISTANT: Thanks for consulting us, have a nice day.

USER: Thank you for your assistance.