You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I would like to visit Las Vegas, please help me to book my flight ticket from IAD to LAS.

ASSISTANT: Sure, can I know your trip dates?

USER: I will depart on Mar 2nd and return back on Mar 4th.

ASSISTANT: Do you have any specifications?

USER: I prefer for an economy class.

ASSISTANT: Can I know your good name?

USER: My name is Emily White.

ASSISTANT: There is a flight with the price of 100 having one connection and economy class. Can I proceed to booking?

USER: Yes, please book the ticket.

ASSISTANT: Your ticket has been reserved with the flight- 1014.

USER: Thank you very much.

ASSISTANT: Thank you for reaching us.