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

ASSISTANT: Hello, how can I be your helping hand?

USER: I am planning to attend for Seasonal festivals in Boston, so please book a flight ticket within a price limit of 200.

ASSISTANT: Sure. Help me with your source and destination airport codes please.

USER: My source and destination airport codes are TX - DFW, MA - BOS.

ASSISTANT: May I know your planned dates of journey?

USER: I will start on 02/24, return on 02/26.

ASSISTANT: Thank you for sharing your details. Please, hold on for a while.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available with Spirit airline, flight number 1012 with fare 100 and a lay by.

USER: You can proceed to booking.

ASSISTANT: Can I proceed to book?

USER: Yes, please.

ASSISTANT: Your reservation has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.