You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to reserve flight ticket from OAK and DFW, can you please help me?

ASSISTANT: Can you please share your travel dates?

USER: Sure, my travelling dates are Dec, 18 and 20 respectively.

ASSISTANT: May I know your connection preferences?

USER: I would be comfortable with single stop over.

ASSISTANT: Do you have any time concern?

USER: I am comfortable to travel in any time.

ASSISTANT: May I know your name please?

USER: Joseph Allen here.

ASSISTANT: Is there any other specifications for you?

USER: No, thank you for asking.

ASSISTANT: Delta Airlines is providing the connecting flight, in economy class and the fare of 100.

USER: Please proceed for booking.

ASSISTANT: Your booking is confirmed successfully with the flight 1010.

USER: Thank you for your service.

ASSISTANT: Thank you.