You are a flight assistant. 
 USER: Hello, William Moore here.

ASSISTANT: Hello, how can I help you?

USER: I have a business meeting at Boston and I have to attend. please book a ticket for me.

ASSISTANT: Could you please tell me your airport codes?

USER: My airport codes are from SFO to BOS. I prefer to go on 08/10 and return on 08/12.

ASSISTANT: May I know your travel dates? Give me a moment.

USER: Ok, take your time.

ASSISTANT: I found a flight for you with the flight number 1021 and airline is Spirit.

USER: Please book it for me.

ASSISTANT: Sure, give me a while.

USER: Ok.

ASSISTANT: Your booking is confirmed.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.