You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Benjamin Roberts.

ASSISTANT: How may I help you with?

USER: I want to attend my parents anniversary so, I want you to book a flight from OAK to MSP. Can you help me?

ASSISTANT: Sure, let me know your travelling dates?

USER: My preferable dates are 10/13 to 10/15.

ASSISTANT: Thank you for your information. I have found a flight 1000 of Spirit airlines, Shall I proceed?

USER: If fare is 200 book it.

ASSISTANT: Yes, price is 100. Your ticket has been booked, have a great journey.

USER: Thank you for booking.

ASSISTANT: Welcome.