You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your name?

USER: Yes, my name is Amy Turner.

ASSISTANT: We found your reservation, can you please share your changed trip dates?

USER: Sure, my planned departure and return travel dates are 18th and 20th of July.

ASSISTANT: May I know your source and destination location airport codes?

USER: My source and destination airport codes are HOU and MCO.

ASSISTANT: Do you have any other preferences?

USER: Yes, my maximum connection has to be 1.

ASSISTANT: Ok, wait a minute.

USER: Sure, I'll be online.

ASSISTANT: There is a flight on United airline, flight number 1021 with the fare of 300. Can I proceed for booking?

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

ASSISTANT: Your ticket has been booked.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.