You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand?

USER: Can you please check with my previous booking and help me out with changing my airport codes?

ASSISTANT: Sure, I will try my best to avail you a best service. Please can you provide me your respected name.

USER: My booking was made on the name of Susan Thompson.

ASSISTANT: Please allow me a moment to check the reservation status in our portal.

USER: Take your own time. I will be waiting for your response.

ASSISTANT: Ok, I found an active reservation on your name. Please provide me your new planned location airport codes.

USER: My airport codes are from EWR to AUS.

ASSISTANT: May I know your trip dates to check the flight in your route?

USER: My journey will start on May 29th and I will be returning on May 31st.

ASSISTANT: Do you have limitation in connection limit?

USER: Yes, I need maximum connection of 1.

ASSISTANT: May I know your class preference?

USER: Any class is fine for me.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Here is a connecting flight with airfare about 200 in UA airlines. Can I proceed with it?

USER: I need depart time in evening only. Can you please check with it?

ASSISTANT: I regret to inform you that, there is no flight in your route as per your request. Sorry for inconvenience caused.

USER: Oh! That's fine. Thank you for checking. You are most welcome.

ASSISTANT: Thank you for reaching us.