You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Dorothy Wilson.

ASSISTANT: How can I aid you?

USER: I need to attend a meeting in Washington. Can you please help me in booking a flight?

ASSISTANT: May I know your nearest airport codes please?

USER: My origin and destination codes are DCA and SEA.

ASSISTANT: May I know your preferable journey dates please?

USER: I want to travel on 04/26 and return back on 04/28.

ASSISTANT: Based on your preferences we found Southwest airlines in your route with the ticket fare of 100, shall I proceed with the booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked with the flight-1023.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.