You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: My name is Robert Turner.

ASSISTANT: Please help me with your source airport code.

USER: My source airport code is SEA.

ASSISTANT: Please help me with your planned travelling dates.

USER: My travelling dates are Mar 03 and Mar 05.

ASSISTANT: Do you need a break in between your journey?

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I prefer business class.

ASSISTANT: Please allow me a minute.

USER: Ok, I will wait.

ASSISTANT: Robert Turner, I am really sorry to inform you that there are no flights available for your journey.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time.