You are a flight assistant. 
 USER: Hello, I am Kevin Hernandez.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Thomson Jefferson memorial in Washington, can you book a flight ticket on 09/15?

ASSISTANT: Sure, please provide me your journey details?

USER: Sure, my return date is 09/17. Source and destination airport codes are from CLT to DCA.

ASSISTANT: We found airline Southwest with fare 200. Flight number 1015 with single connection.

USER: Ok, please proceed for booking.

ASSISTANT:  Your booking is done.

USER: Thank you for your support.

ASSISTANT:  Thank you, have a nice day.