You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please change my existing reservation due to postponed of my friend marriage?

ASSISTANT: Sure, we are here to help you. Kindly mention your name to proceed further?

USER: My name is Thomas Martinez.

ASSISTANT: Please hold a moment.

USER: OK.

ASSISTANT: Thank you for your time, we have found a reservation on your name. Please share your new reservation journey details?

USER: My journey is from New York, NY - LGA to return from Oakland, CA - OAK.

ASSISTANT: Kindly mention your dates of travelling?

USER: My journey dates are 04/11 to 04/13.

ASSISTANT: Ok, please hold a moment.

USER: Sure.

ASSISTANT: Thank you for your time, we have found a Spirit airline, flight number-1006 connections-1 and ticket fare is 100.

USER: Please make it to confirm.

ASSISTANT: Sure, your reservation has been done.

USER: Thank you for supporting.

ASSISTANT: Thank you for approaching us.