You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to attend my business meeting at Oakland, could you book my ticket from New York?

ASSISTANT: Sure, can you share your trip dates?

USER: My itinerary dates are Mar 9 and Mar 11.

ASSISTANT: May I know your journey airport codes?

USER: My genesis and terminus airport codes are JFK and OAK.

ASSISTANT: Do you have any preferences?

USER: I prefer to travel in business class.

ASSISTANT: May I know your name?

USER: Nancy Collins here.

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

USER: I want to depart from New York in the morning, can you check?

ASSISTANT: Sorry, there is no flight which depart in morning.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.