You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Michael Allen, I need to schedule my trip to Philadelphia. Can you please help me for booking the ticket from SEA to PHL?

ASSISTANT: Ok, please tell me your travel dates.

USER: I will depart on 12/20 and again I will be return back on 12/22.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Flight 1023 of AA airlines is available for you.

USER: Yes, you can proceed for booking.

ASSISTANT: Allen, your ticket is confirmed.

USER: Thank you very much for booking the ticket.

ASSISTANT: You are welcome.