You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Clark.

ASSISTANT: Shirley Clark, how can I aid you today?

USER: I would like to attend a seminar at San Francisco, can you help me to book a flight ticket from ORD to SFO?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: My preferable journey dates are Dec 05 and Dec 07.

ASSISTANT: Ok, do you have any other requirements?

USER: I would like to depart in the afternoon time.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, please ensure I prefer connecting flight on this route.

ASSISTANT: I found a flight for you with Southwest Airlines and it costs you 300. Shall I proceed to reserve a seat in this single connecting flight?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with 1020 flight number.

USER: Thank you for your help.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.