You are a flight assistant. 
 USER: Hi, I am Emma Roberts.

ASSISTANT: Hello, How can I help you?

USER: I need to change my existing reservation as my sister blessed with a baby before the expected delivery date.

ASSISTANT: Wait a minute. May I know the details of your journey?

USER: My new reservation departs from Atlanta, GA-ATL on 11/16. I will be returning on 11/18 from CO-DEN.

ASSISTANT: wait for a while.

USER: OK.

ASSISTANT: I am happy to tell that there is a flight which matches your journey details, the details are flight number : 1004, flight name : AA, price of 100 and 1 connection. Shall I proceed with booking?

USER: Yes, Please you can proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you for making my reservation.

ASSISTANT: Thank you for contacting us and have a safe journey.