You are a flight assistant. 
 USER: Hi, Margaret Thompson here.

ASSISTANT: Hello, how can I help you?

USER: Due to change in the dates of my project deadline from our client, I would like to change in my existing reservation, can you please help me?

ASSISTANT: Sure, please give me a second to check the status.

USER: Take your time.

ASSISTANT: Yes Margaret, I have found your previous flight ticket.

USER: Ok, thanks a lot.

ASSISTANT: Can you please provide your new source and destination details?

USER: My airport codes would be MCO to AUS.

ASSISTANT: Ok, can you please provide your preferable travelling dates?

USER: My new travel dates are 05/14 to 05/16.

ASSISTANT: As per your request I got a Spirit airline with flight number 1003 is available. Shall I book this flight ticket?

USER: Ok, please book it.

ASSISTANT: Ok, your ticket is booked successfully.

USER: Thank you for your service.

ASSISTANT: Have a safe journey. You are welcome.