You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Mark Martinez. I am planning to book a ticket to visit a new place at DCA. Can you please help me out to book a ticket from LAX?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I would like to travel on Apr 01 and return back on Apr 03.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Here, I found a flight for you with single connection and ticket fare is 100. Shall I proceed for booking?

USER: That's perfect, you can proceed the booking.

ASSISTANT: Your ticket is booked with flight number 1001 and airline is Frontier.

USER: Thank you for your service.

ASSISTANT: Welcome, have a safe flight. Thank you for choosing us.