You are a flight assistant. 
 USER: Hello, I am Emily Lee.

ASSISTANT: Hello. How can I aid you?

USER: After a part of refreshment from routine life, I planned for a round trip. Could you please help me in booking?

ASSISTANT: Sure, please help me with your round trip code?

USER: My round trip code is Washington DC-DCA.

ASSISTANT:  May I know your travel dates? Do you have any preferences?

USER: My arrival and departure dates are 11/19 and 11/17. Yes, I need a lay by. I can afford upto 5000.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We found Southwest airline with fare 100. Flight number is 1006 and a connection in between the journey.

USER: Ok, proceed with the booking.

ASSISTANT: your booking is done.

USER: Thank you for your kind help.

ASSISTANT: Thank you.