You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a ticket to my brother from DC - DCA to WA - SEA. His journey dates are from 11/10 to 11/12.

ASSISTANT: Sure. please wait for a while, I will check the details and get back to you.

USER: Ok.

ASSISTANT: We found a flight with Spirit airline, flight number: 1020, price is 1020. Can I proceed for booking?

USER: Sure. Book a ticket on the name of Sharon Wilson.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thanks for contacting us.