You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am looking to book a flight from OAK to LAX. Can you help me for that?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are Jan 26 and Jan 28.

ASSISTANT: Do you prefer any connections?

USER: I prefer to book a single connecting flight.

ASSISTANT: May I know your specifications?

USER: My return time is morning.

ASSISTANT: Hawaiian airlines providing a connecting flight in economy class.

USER: Once please check is it normal cost or not. If it is normal cost proceed for booking.

ASSISTANT: Sorry, there are no flight in morning just now we got an update.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you. Please share your name.

USER: My name is Kevin Martinez.

ASSISTANT: Thank you.