You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have a business meeting in Las Vegas. Can you help me for booking a flight ticket from HOU to LAS?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are Sep 01 and Sep 03.

ASSISTANT: Is a connecting flight works for you?

USER: I need a single connecting flight.

ASSISTANT: Which class do you prefer to travel?

USER: Any class is fine for me.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Jonathan Anderson.

ASSISTANT: We don't have any flight available on given dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.