You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Baker.

ASSISTANT: Baker, what kind of service you are expecting from us?

USER: I am planning to book a ticket from Oakland-OAK to New York-EWR to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am mirthful to help you. May I know your travel dates please?

USER: I am departing on 12/05 and willing to return on 12/07.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you. Sorry Baker, there are no flights available on your requested dates.

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

ASSISTANT: Welcome, thank you for choosing us. Have a great day.