You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Brenda Brown.

ASSISTANT: Your reservation is found. Please share your trip dates.

USER: My travelling dates are 04 to 06 of Apr.

ASSISTANT: Can I know your airport codes?

USER: ATL and IAD are my travelling airport codes.

ASSISTANT: Jetblue Airlines is providing connecting flight on this route with a ticket fare of 200 and flight departs at 5:00 hours and arrives at 17:00 hours, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: Your reservation has changed in flight 1021.

USER: Thank you.

ASSISTANT: Thank you for opting us.