You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend a Seminar in Austin. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, May I know your journey dates?

USER: My travelling dates are June 26 and June 28.

ASSISTANT: Ok, please let me know your connection limit.

USER: I prefer single connecting flight.

ASSISTANT: Ok, please provide your journey airport codes.

USER: My airport codes are LAS and AUS.

ASSISTANT: Ok, Do you have any class preference?

USER: No, I don't have any other preferences.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, There were no flights found with your given requirements.

USER: Anyway, thanks for the information.

ASSISTANT: May I know your name?

USER: My name is Melissa Hill.

ASSISTANT: Thank you for choosing us.

USER: Thanks for helping me.

ASSISTANT: Have a nice day.