You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from DCA to Las Vegas, LAS. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from Apr 02 to Apr 04.

ASSISTANT: Can I know your connection limit?

USER: Sure, I need a connecting flight in my journey.

ASSISTANT: Do you have any other specifications?

USER: I always prefer economy class.

ASSISTANT: May I know your name?

USER: My name is Laura Taylor. Please make sure that, I would like to depart in the Afternoon time.

ASSISTANT: We found a flight on frontier airline, flight number 1010 with the fare of 200 and depart time is 14:00pm.

USER: That's perfect, please confirm the ticket booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.