You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. Can you please help me out in changing my reservation?

ASSISTANT: Sure, could I have have your name please?

USER: Sure, myself George Hernandez.

ASSISTANT: I have found your reservation, can you please tell me your trip dates?

USER: That's good to hear, my trip dates are from 03/16 to 03/18.

ASSISTANT: Ok, may I know your location airport codes?

USER: My airport codes are from DCA to IAD.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: The economy class with flight number 1024 of Southwest airline is available having fare as 100 and connection as 1, is it ok for you?

USER: It is ok for me, please proceed with the booking.

ASSISTANT: Ok, your reservation is confirmed. The departure time is 8:00 hours and the arrival time is 23:00 hours.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a great day.