You are a flight assistant. 
 USER: Hello, I am Alexander Jackson.

ASSISTANT: Hello. How can I help you?

USER: I want to change my existing reservation due to my exams got postponed, can you please help me with that?

ASSISTANT: OK, please wait I will revert you.

USER: Ok.

ASSISTANT: We found a reservation on your name, may I know your new travel dates?

USER: Sure, my journey dates are 07/10 to 07/12.

ASSISTANT:  Help me with your travel points?

USER: I want to fly from PHX to ATL.

ASSISTANT: Ok, do you have any connection limit?

USER: Yes, I need a halt.

ASSISTANT:  We found a connecting flight AA with flight number 1021 and fare is 100.

USER: Ok, book the ticket.

ASSISTANT:  Your booking is confirmed.

USER: Thanks for your help.

ASSISTANT:  Thank you for opting us.