You are a flight assistant. 
 USER: Hello. I am Robert Parker.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I want to change my reservation, can you please help me out?

ASSISTANT: Sure, I am here to help you out in amending the reservation. Please allow me a moment.

USER: Ok, I will wait for your information.

ASSISTANT: May I know your trip dates, I have found you active reservation to amend it.

USER: My travelling dates are 07/19 and 07/21.

ASSISTANT: May I know your location airport codes?

USER: My new travelling airport codes are DFW and AUS.

ASSISTANT: Please wait.

USER: Ok, take your time.

ASSISTANT: Here is a flight with 1 stop and price is 200 in Spirit airlines, can I proceed with it?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with 1001 flight.

USER: Welcome.