You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself David Wilson. I want to travel from OAK-LAS to visit my sister, could you please me out in booking a flight ticket?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 12/06 and return on 12/08.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1020. Shall I proceed with this flight?

USER: sure, proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you for helping me.

ASSISTANT: Most welcome.