You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed.

ASSISTANT: Sure, I am here to help you. Can you please provide your name to check your reservation status?

USER: Sure, my name is Joshua Brown.

ASSISTANT: Joshua Brown, I have found your reservation. Can you please provide your airport codes of journey?

USER: Sure, my source and destination airport codes are MCO and IAH.

ASSISTANT: May I know your preferable journey dates for this trip?

USER: I want to depart from my location on 18th Dec and I want to return back by 20th Dec.

ASSISTANT: Do you have any connection limit preference?

USER: My maximum connection has to be 1.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to depart in the morning time.

ASSISTANT: American Airlines is providing connecting flight on this route with a ticket fare of 600 and flight departs at 3:00AM and arrives at 1:00AM, shall I book your ticket in this flight?

USER: That's fine for me, you can proceed for booking.

ASSISTANT: Joshua Brown, your ticket is booked in business class of flight number 1020.

USER: Thank you so much for your help.

ASSISTANT: You are welcome and have a safe journey.