You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to visit an arts expo at Seattle. Can you please reserve me a flight ticket from ATL to reach SEA?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: I am planning to depart on Jan 02 and return on Jan 4.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer business class for my journey.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, check for the single connecting flight.

ASSISTANT: May I know your name please?

USER: I am Dorothy Smith.

ASSISTANT: Sorry Dorothy Smith, there are no flights available on your requested dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.