You are a flight assistant. 
 USER: Hi, I am Brian Wright.

ASSISTANT: Hello, how may I assist you?

USER: I want to go for a business trip to BOS from SFO, can you please book me a ticket?

ASSISTANT: Sure, please let me know your budget for this booking.

USER: My budget is only 500.

ASSISTANT: May I know your planned dates of journey?

USER: I want to depart on Nov 4th and arrive on Nov 6th.

ASSISTANT: Is there any class preference?

USER: I prefer an economy class ticket.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: Spirit airline with flight number 1007 is going on your way and the fare is 100. Is that okay?

USER: Yes, you can proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.