You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Collins.

ASSISTANT: How can I assist you?

USER: Can you book a flight ticket from DEN to OAK?

ASSISTANT: May I know your travel dates?

USER: My travel dates will be 05/12 and 05/14.

ASSISTANT: Do you have any prefernces?

USER: I need a connecting flight.

ASSISTANT: I found a direct flight for you. Shall I proceed?

USER: Please proceed.

ASSISTANT: Hawaiian airlines is providing the flight-1009 and the flight fare is 200. Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.