You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Andrew Taylor.

ASSISTANT: How may I assist you?

USER: I need to schedule my trip to Washington. Can you please help me in reserving the ticket from PHL to DCA?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I will drop-off 03/21 and again I will be return back on 03/23.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Southwest airlines is available in your route with the ticket fare of 100, shall I proceed with the booking?

USER: Yes, I think that can work for me. Please proceed for booking.

ASSISTANT: Your ticket is booked with the flight-1000.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thank you for reaching us.