You are a flight assistant. 
 USER: Hello. I am Jason Perez.

ASSISTANT: Hello, how can I assist you today?

USER: I want to cancel my reservation due to prepone of my friends party at Chicago.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry we couldn't find any reservation on your name.

USER: Thank you for informing.

ASSISTANT: Thank you for reaching us.