You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I am planning to book a flight ticket to OAK from DCA, can you please help me out?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Sure, my planned travelling dates are Jan 08 and Jan 10.

ASSISTANT: Ok, please let me know your preferable class.

USER: Sure, I prefer business class.

ASSISTANT: Do you have any more specifications?

USER: I am looking for a flight with 1 connection.

ASSISTANT: Can I have your good name please?

USER: Sure, my name is Anthony Jackson.

ASSISTANT: Sorry Anthony Jackson, no flight is available to you in business class on your dates.

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

ASSISTANT: Thank you for choosing us, have a good day.