You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name to check with existing reservation?

USER: I am Michael Roberts.

ASSISTANT: I found your reservation. Can I know your journey dates?

USER: My travel dates are Mar 25 to 27.

ASSISTANT: Could you share your airport codes?

USER: My airports codes are DCA to IAD.

ASSISTANT: Do you have any specifications?

USER: I prefer connecting flight.

ASSISTANT: Southwest Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 0:00 hours and arrives at 19:00 hours, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: Your reservation is changed in flight 1019.

USER: Thank you.

ASSISTANT: Thank you for choosing us.