You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Elizabeth Harris. I am planning to visit a Oakland from DTW to OAK. Can you help me out to book a ticket?

ASSISTANT: Sure, can I know the trip dates please?

USER: My preferable dates are 03/23 and 03/25.

ASSISTANT: Ok, wait a moment please.

USER: Sure. take your own time.

ASSISTANT: There is a flight with price 100 in Spirit airline, shall I book it?

USER: May I know the price? Yes, you can proceed.

ASSISTANT: Your ticket has been booked with flight number 1019.

USER: Thank you for your help.

ASSISTANT: You are welcome.