You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I have planned to go for coolest place in AUS and now I am planning to go for ATL.So can you please change my existing reservation?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: My ticket was reserved in the name of  Barbara Jones name.

ASSISTANT: Jones, there was no active no reservations on your name in our database.

USER:  Oh! it might not have confirmed by your agent on that day when I have reserved.

ASSISTANT: Thank you for choosing us. Have a nice day.

USER: Thank you for your information.