You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Can you aid me in booking a flight ticket from SEA to AUS?

ASSISTANT: Sure, I am here to help you with that. Could you please tell me your departure and arrival dates?

USER: I am planning to depart on Dec 16th and return back on Dec 18th.

ASSISTANT: Are you ok with the connecting flight?

USER: Make sure that connection limit is 1.

ASSISTANT: Ok, is there any class preference?

USER: I prefer to travel in business class.

ASSISTANT: Can I know your name please?

USER: I am Daniel Miller.

ASSISTANT: I am really sorry to tell you that, there are no flights available in the business class.

USER: No issues. Thank you for checking.

ASSISTANT: You are most welcome. Thank you for contacting us.