You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a flight ticket from LAX to IAD, Can you please help me for booking?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I would like to travel on 03/20 to return on 03/22.

ASSISTANT: Do you need any break?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Stephen Jones.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need  a economy class.

ASSISTANT:  Ok, We found a connecting flight with an Southwest airline, flight number:1004. Can I reserve it?

USER: Ok, reserve it.

ASSISTANT: Your flight ticket has been reserved with an economy class flight ticket.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.