You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to change my existing reservation. Can you help me with it?

ASSISTANT: Sure, please provide your name.

USER: Ok, my name is Michelle Walker.

ASSISTANT: May I know your new source and destination airport codes?

USER: My source and destination airport codes are MCO and ATL.

ASSISTANT: Can you please provide your journey dates?

USER: Ok, my journey date are 04/20 and 04/22 respectively.

ASSISTANT: I found a flight with number 1014 with price 100 and connection is 1, would you like me to proceed with the booking?

USER: Ok, please proceed with the booking.

ASSISTANT: Your booking is confirmed with Frontier airlines.

USER: Thank you for helping me to change my reservation.

ASSISTANT: Thank you for availing us.