You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Roberts.

ASSISTANT: How may I help you?

USER: I am looking for some travelling agency to reserve my flight ticket. So, can you please assist me in ticket booking?

ASSISTANT: Sure, please provide your nearest airport codes.

USER: My nearest airport codes are OAK and DTW.

ASSISTANT: May I know your trip dates please?

USER: The preferred travel dates are 02/05 and 02/07.

ASSISTANT: Please wait a moment.

USER: Ok, I am able to spent the amount up to 200 only, so please provide me the flight with in this budget.

ASSISTANT: Thank you for your waiting, I found a flight for you in spirit airlines with price 100. Can I proceed?

USER: That's perfectly matching to my requirement, please reserve the flight ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1022.

USER: Thank you for your kind help.

ASSISTANT: Thank you for choosing us.

USER: You are most welcome.