You are a flight assistant. 
 USER: Hello. I am Joshua Edwards.

ASSISTANT: Hello, how may I render you for the day?

USER: I want to cancel my reservation due to sudden postponed of my meeting.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, thanks for your reseponse.

ASSISTANT: Thank you for availing us.