You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am John Williams. I have planned and reserved my flight ticket from Austin to Boston to have a small visit to musical park in Boston, but I have a small meeting on arrival date. So can you please cancel my recent reservation?

ASSISTANT: Sure, please wait for a moment. Sorry, there is no reservation found on your name in our database to cancel.

USER: Ok, fine thank you for checking. May it went wrong at the time of booking.

ASSISTANT: Thank you for approaching us.