You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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: Sure, my name is Jonathan Thomas.

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

USER: Yes, my planned departure and return travel dates are 20th and 22nd of May.

ASSISTANT: May I know your journey airport codes?

USER: My source and destination airport codes are IAH and ORD.

ASSISTANT: Do you have any preferences?

USER: I prefer economy class and I need 1 halt in between my journey.

ASSISTANT: There is a direct flight with number 1012 in airline AA, the fare is 100 in economy class. Can I book it?

USER: Yes, you can proceed for booking.

ASSISTANT: Your ticket is reserved, the depart time is 1:00 AM and return time is 10:00 AM.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.