You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have a business meeting at Seattle this week day. Can you please help me in reserving the ticket from DCA to SEA?

ASSISTANT: Sure, I will help you. May I know your planned travel dates please?

USER: I am planning my trip on Sept 21, and again I will return back on Sept 23.

ASSISTANT: Can I have your name please?

USER: Myself Frank Hernandez.

ASSISTANT: Do you need a connecting flight?

USER: I am flexible with direct flight.

ASSISTANT: Do you have any other specifications?

USER: My return time is afternoon.

ASSISTANT: Do you have any airline preference?

USER: I am comfort with any airlines.

ASSISTANT: I found an economy class in Frontier airlines with fare 200 and it is a direct flight. Can I book your ticket?

USER: Yes, please go ahead and reserve the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1004.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thank you for approaching us.