You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Thomas Martinez. I am planning to attend my meeting at Seattle. Can you please help me for booking a ticket?

ASSISTANT: Sure, may I know your nearest origin airport code and  destination airport code please?

USER: My source airport code is PHL and my destination airport code is SEA.

ASSISTANT: May I know your preferable journey dates please?

USER: I will depart on 04/11 and again I will be return back on 04/13.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Southwest airlines is available in your route with the ticket fare of 200, shall I proceed with the ticket booking?

USER: Sure, you can proceed for booking the ticket.

ASSISTANT: Your ticket is booked with flight-1023.

USER: Thank you very much for your help.

ASSISTANT: Thank you for reaching us.