You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Anthony Hall.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, we found reservation on your name, please provide your travelling dates.

USER: Sure, my new dates are Jan 23-25.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are ORD to ATL.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: You have a connecting flight 1007 in Southwest airline and price 100, Shall I proceed to change?

USER: Ok, please go ahead.

ASSISTANT: Your reservation has been changed successfully.

USER: Thank you.

ASSISTANT: Thank you.