You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation due to postpone of my nephew cradle ceremony. Can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: Sure, Cynthia Baker here.

ASSISTANT: We found a reservation with your given name, please share your new journey dates.

USER: Sure, my travelling dates are Apr 17 and Apr 19.

ASSISTANT: May I know your source and destination airport codes?

USER: My airport codes are ORD and MCO.

ASSISTANT: Do you want connecting flight?

USER: I prefer to travel in a direct flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: We found a Spirit airline, flight number: 1003, price: 100, it is a direct flight.

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.