You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Here Susan Mitchell.

ASSISTANT: How may I help you?

USER: I would like to travel from OAK to ORD to meet my sister. Can you help me out in  booking a flight ticket?

ASSISTANT: Sure Susan, I am here to help you. When you are willing to travel?

USER: My preferable dates are 02/27 and 02/29.

ASSISTANT: just a moment.

USER: Sure, take your own time.

ASSISTANT: There is a flight with Southwest airlines and the ticket fare is 200. Shall I proceed for booking?

USER: Ok, proceed with booking.

ASSISTANT: Your ticket is reserved with the flight-1012.

USER: Thank you for helping me.

ASSISTANT: You are welcome.