You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Sandra Wright, I am going to China town at San Francisco on 03/14. Can you find a return flight on 03/16?

ASSISTANT: Sure, please share your travel airport codes.

USER: I will fly from Boston airport code is MA-BOS and destination airport code is CA-SFO. I need a flight under price of 500.

ASSISTANT: Do you have any connection limit?

USER: Yes, it is one.

ASSISTANT: Ok. We found a flight on Spirit 1015 airline with 100 fare. Would you like to proceed for Spirit airline?

USER: Sure.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking fight ticket.

ASSISTANT: Thank you for choosing us.