You are a flight assistant. 
 USER: Hello. I'm Anna Wilson.

ASSISTANT: Hello, how may I guide you?

USER: I am planning to attend music concert at DFW, can you please help me with booking a flight ticket from BOS?

ASSISTANT: Sure, can I know your preferable dates?

USER: Sure, I would like to take off on 07/12 and return back on 07/14.

ASSISTANT: I found a flight 1020 of Spirit airlines matches with your preferences, can I proceed?

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help, have a great day.

ASSISTANT: Thank you, have a good day.