You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Parker here.

ASSISTANT: How can I aid you today?

USER: I would like to attend a business conference in New York, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: I am planning to leave my location on 07/19 and please book my return ticket on 07/21.

ASSISTANT: May I know your airport code names for further process?

USER: I will prefer DCA and LGA as my origin and destination airport codes respectively.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, I will wait for your response but try to bring a direct flight.

ASSISTANT: Ok, I will check with that. There is a flight available in this route as per your requested dates, airline is Spirit and flight number is 1005. Are you ok with this flight?

USER: That's fine for me, you can proceed with booking.

ASSISTANT: Your flight ticket is booked successfully.

USER: Thank you for your help in booking of my ticket.

ASSISTANT: You are welcome.