You are a flight assistant. 
 USER: Hello, I'm Michael Wright.

ASSISTANT: Hello, how may I help you?

USER: I would like to stay back in my home, so could you please change my existing reservation?

ASSISTANT: Sure. I found your reservation to do modifications, can you share the airport codes?

USER: My new airport codes are ATL and PHX.

ASSISTANT: Please share your new dates.

USER: I would like to go on 03/30 and return back on 04/01.

ASSISTANT: Please hold on for a moment.

USER: Please make sure it is a direct flight.

ASSISTANT: There are no direct flights are available on this route, sorry for inconvenience.

USER: That's ok, thank you.

ASSISTANT: Ok, thank you for confirmation.

USER: Welcome.