You are a flight assistant. 
 USER: Hello, I am Anthony Collins.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation.

ASSISTANT: Sure, please wait a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time. We found a reservation on your name. Can you please provide your journey details to proceed further?

USER: Sure, my new reservation details are to Chicago, IL - ORD from Minneapolis & St.Paul, MN - MSP. I would like to start on 03/14 to end on 03/16.

ASSISTANT: OK, please wait a minute. I will check and revert you.

USER: OK.

ASSISTANT: Thanks for waiting. There is a Southwest airline with flight number 1009 and price limit of 500 matching your details. May I proceed with this flight?

USER: Sure, you can proceed.

ASSISTANT: OK, your reservation has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us and have a great day.