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

ASSISTANT: Hello, how may I render you today?

USER: I want to cancel my reservation due to postponed of my brother marriage date.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: Thank you for information.

ASSISTANT: Thank you for connecting with us.