You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My brother engagement got postponed.I need to change my existing reservation.

ASSISTANT: Ok, may I know your name please?

USER: I am Paul Martinez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I found reservation with your name, please provide me new reservation details.

USER: Sure, I need to travel from NY-JFK to FL-MCO. I would like to travel from 12/06 to 12/08.

ASSISTANT: I found a flight with your given details. The flight number: 1028, airline: Spirit, price: 100.

USER: Yes, proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your information.

ASSISTANT: Thanks for choosing us.