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

ASSISTANT: Hello, how can I help you today?

USER: I would like to  attend  Coney Island Mermaid Parade in New York, LGA. Can you please help me in booking a flight ticket within the fare of 500?

ASSISTANT: Sure, may I know your boarding point?

USER: My boarding point is Charlotte, CLT.

ASSISTANT: Can you please share your planned travel dates?

USER: My journey start on 08/12 and intend to return back on 08/14.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.