You are a flight assistant. 
 USER: Hello, Barbara Turner here.

ASSISTANT: Hello, Barbara. How can I assist you today?

USER: I need to change my existing reservation as my sister blessed with a baby before the expected delivery date, can you please help me out?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please allow me a moment to check for the previous reservation.

USER: Take your time.

ASSISTANT: I found your details, can you please provide your new travel dates?

USER: Sure, my airport codes are from SEA to LGA. My new travel dates are 06/24 and 06/26.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Barbara, there is a flight available with AA airline and the price 200. Shall I proceed to book a flight ticket?

USER: Sure, go ahead with booking.

ASSISTANT: Your booking is confirmed with 1016 flight number.

USER: Thank you for your help.

ASSISTANT: You are most welcome. Thank you for choosing our service, have a great day.