You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Adams.

ASSISTANT: How can I assist you today?

USER: I planned to attend for my university exam in ORD, can you help me to book the flight ticket from SFO?

ASSISTANT: Could you please share your preferable travel dates?

USER: I would like to travel on 06/21 and 06/23.

ASSISTANT: Ok, let me check for the availability of flight. Steven, there is a flight available at your request with price 200 and the airline is UA with 1023 flight number.

USER: Please book the ticket.

ASSISTANT: Your booking is confirmed successfully.

USER: Thank you for your assistance.

ASSISTANT: You are welcome. Thank you for contacting us.