You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket with the name Robert Moore to attend my sister's engagement with in the price limit 500?

ASSISTANT: Sure, when are you planning to travel?

USER: My plan to travel on 08/02 to 08/04.

ASSISTANT: Please provide your airport codes.

USER: I will depart at Washington DC-DCA to New York, NY-JFK.

ASSISTANT: Southwest airlines with single connection and price is 100 of 1023 flight. Shall I proceed for booking?

USER: Make sure I need a direct flight.

ASSISTANT: Your ticket has been confirmed.

USER: Ok, thank you.

ASSISTANT: Thank you.