You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: My name is Raymond Smith. I want to book a flight ticket with a price limit of 500 to watch sports events in Washington.

ASSISTANT: Ok, can you please share your airport codes?

USER: My source and destination airport codes are TX-DFW, DC-DCA.

ASSISTANT: May I know your journey dates?

USER: My departure day is 02/28, return day is 03/01.

ASSISTANT: We found a flight with a fare of 100 having single connection. Flight number is 1022 having single connection. Shall I book it?

USER: You can proceed to booking.

ASSISTANT: Your booking has been done. Thank you for contacting us.

USER: Thanks for your service.

ASSISTANT: Have a good day.