You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I serve you today?

USER: I would like to cancel my recent reservation as my plan for a vacation got postponed.

ASSISTANT: Sure, May I know your name please?

USER: I am Emily Jones.

ASSISTANT: OK, Please wait for a minute.

USER: OK.

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

USER: OK, thanks for your response.

ASSISTANT: Have a Pleasant day.