You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I planned to meet american president, Due to some reason it is got postpone. Can you cancel my reservation?

ASSISTANT: Sure, may I know your name?

USER: Jennifer Lopez.

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

USER: Ok. Thanks for the information.

ASSISTANT: Thank you for reaching us, have a splendid day.