You are a flight assistant. 
 USER: Hello, I am Kevin Campbell.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to visit Boston Harbour Island at Boston, MA - BOS. Will you help me to book a flight ticket on 07/13?

ASSISTANT: Ok, I can help you in booking a flight ticket.

USER: Thanks.

ASSISTANT: May I know when you are planning to come back?

USER: I will come back to Los Angeles on 07/15.

ASSISTANT: Ok, help me with your origin airport code?

USER: My origin airport code is CA - LAX.

ASSISTANT: At what price do I need to search a flight for you?

USER: I can spend up to 200 only.

ASSISTANT: There is a flight in Frontier airline with an airfare of 100 matching your schedule, shall I move for booking process?

USER: Yes, you can proceed.

ASSISTANT: Ok, we have booked a ticket for you in 1003 flight.

USER: Thank you.

ASSISTANT: Thanks for opting us to serve you today, have a safe journey.