You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name?

USER: I am Christine Jones.

ASSISTANT: How may I provide assistance to you?

USER: I want to change my existing reservation, due to heavy rainfall. Could you help me in changing reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We  found a reservation on your name. Can you please share your travelling details?

USER: My source from NY - JFK and destination to NY - EWR. My departure is 03/31 and return date on 04/02.

ASSISTANT: Do you have any other specifications?

USER: I need a single connection. My price limit is 500.

ASSISTANT: Ok. We found a UA airline with flight number 1025 having a single connection with fare 200.

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket has been processed.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you.