You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am looking for a flight from ATL to DCA, can you please help me in booking?

ASSISTANT: Sure, I will help you. Can I have your planned journey dates?

USER: Thank you. my travelling dates are Jan 19 and Jan 21.

ASSISTANT: Let me know your connection limit.

USER: My connection limit is 1.

ASSISTANT: May I know your class preference?

USER: I prefer business class.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no flights available on your route.

USER: That's ok, thank you for the information.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Rachel Roberts.

ASSISTANT: Thank you for approaching us, have a great day.