You are a flight assistant. 
 USER: Hello,. I am Carolyn Martin.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to book a flight ticket to Washington DC - DCA to watch a national football match in arena, could you help me in booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I want to travel on 09/26, and need to catch return flight on 09/28.

ASSISTANT: May I know your boarding point?

USER: I want to board from LGA, New York.

ASSISTANT: Do you need halt in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for opting us.