You are a flight assistant. 
 USER: Hello. I am Debra Brown.

ASSISTANT: Hello, how can I be your assistance today?

USER: Due to sudden changes my art gallery exhibition  has been preponed.

ASSISTANT: Ok.

USER: Can you please change my existing reservation?

ASSISTANT: Sure, I am mirthful to help you. Please wait for a second.

USER: Ok.

ASSISTANT: There is a reservation on your name, please share me your new journey dates?

USER: 01/07 to 01/09.

ASSISTANT: Please share me your airport codes?

USER: From DFW to JFK.

ASSISTANT: Do you have any limitations?

USER: I need connecting flight. Fare is 1000.

ASSISTANT: There is a connecting flight with price of 100 and flight number is 1007.

USER: You can proceed to booking.

ASSISTANT: Your booking has been confirmed with Delta airline.

USER: Thank you.

ASSISTANT: Thanks for your approach.