You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Jeffrey Hernandez, can you help me to book a flight ticket?

ASSISTANT: Sure, can I know your airport codes?

USER: I am planning to visit Lincoln Memorial at IAD from my location OAK.

ASSISTANT: Can I know your travel dates?

USER: Sure. My dates are 03/19 and 03/21. Did you find any flight for me?

ASSISTANT: Yes, the flight 1003 of Southwest airlines is available on your request.

USER: Please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help in booking.

ASSISTANT: Welcome.