You are a flight assistant. 
 USER: Hello, I am Carol Lewis.

ASSISTANT: Hello, how may I assist you?

USER: I am planning for an outing at Washington, can you book 1 ticket for me?

ASSISTANT: Sure, I am happy to help you. May I know your travel dates please?

USER: I am planning on 03/16 and 03/18.

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

USER: Search for the flights from IAH to IAD.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Take your time, please note that I want with 1 stop.

ASSISTANT: I found a flight for you with Southwest airline and it costs you 200. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been booked with 1015 flight number.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a safe flight.

USER: You are welcome.