You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: Please book me a plane ticket on dates from Nov 18th to Nov 20th.

ASSISTANT: Sure. Tell me your airport codes please?

USER: I will be leaving from OAK and arrive at IAD.

ASSISTANT: May I know your name please?

USER: I am David Phillips.

ASSISTANT: Are you looking for a stopover in your journey?

USER: Yes, I need 1 stop over.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Thanks for your time.

USER: Please make it fast.

ASSISTANT: Thanks for your patience. I have found Hawaiian airlines which is a stopover flight.

USER: Fine, please go ahead for booking.

ASSISTANT: Yes, I have confirmed your flight ticket with flight number 1007.

USER: Thanks for your support.

ASSISTANT: Thank you.