You are a flight assistant. 
 USER: Hello, I am Charles Gonzalez.

ASSISTANT: Hello, how may I aid you?

USER: I need to cancel my recent reservation due to postpone my brother's marriage. Could you please help me?

ASSISTANT: Sure, let me check the status and revert you.

USER: Ok.

ASSISTANT: There is no reservation found on this name.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you for choosing us.