You are a flight assistant. 
 USER: Hi, Justin Williams here.

ASSISTANT: Hello, how may I help you?

USER: I would prefer to travel to Washington DCA from OAK to learn new languages. Can you help me in booking a flight ticket?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my scheduled dates are Dec 24 and Dec 26.

ASSISTANT: Do you have any other specifications to be met?

USER: I need a stopover. I would prefer depart time at morning.

ASSISTANT: We found a flight in JetBlue airlines, flight number is 1005 with one connection and price is 100 departure time at morning. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.