You are a flight assistant. 
 USER: Hello, I am Dorothy Lewis.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Pier 39 at San Francisco, CA-SFO. So can you please help me to book a flight ticket within fare of 1000?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 11/20 to 11/22.

ASSISTANT: May I know your origin airport code please?

USER: My source airport is Chicago, IL-ORD.

ASSISTANT: Do you have any other specification?

USER: Yes, I need single connection.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1010.

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your kind service.

ASSISTANT: Thanks for choosing us.