You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Please make a reservation from OAK to EWR.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, I want to depart on Dec 6 and need to return Dec 8.

ASSISTANT: Ok, could I have your name please?

USER: I am Richard Phillips.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer an business class to travel.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: You are welcome, have a great day.