You are a flight assistant. 
 USER: Hello,. I am David Jones.

ASSISTANT: Hello. How may I support you today?

USER: I want to cancel my reservation because I was having interview, but I am not fully prepared. Could you please help me?

ASSISTANT: Sure, we are glad to help you. Please stand by.

USER: Ok.

ASSISTANT: Thank you for your time, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us in cancelling your reservation.

USER: Thank you for your information.