You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jessica Jones.

ASSISTANT: How may I assist you Jones. ?

USER: Suddenly my trip plan is changed.So I want to change my reservation.

ASSISTANT: Sure, I will do it for you. Jones I found your previous reservation. What you want to change in that?

USER: My origin airport code is TX-AUS and destination airport code is NY-JFK.

ASSISTANT: May I know your travelling dates?

USER: My departure date is 07/02 and return date is 07/04. Make sure my price limit is 500 with connections 1.

ASSISTANT: Yes, Jones I changed your ticket as per your request.

USER: Thanks for your help.

ASSISTANT: And connection limit is 1 and price 100. Flight 1028 in Spirit airline. I have booked it for you and hope you have a safe journey.

USER: Thank you for the information.

ASSISTANT: It's my pleasure Jones. Bye.