You are a flight assistant. 
 USER: Hello, I am Nicholas Lewis.

ASSISTANT: Hello, how may I be at your service today?

USER: Could you please book a flight ticket from SFO to AUS with a connecting flight?

ASSISTANT: Sure, can you please forward your depart and arrivals dates?

USER: I want to depart on Oct 12 and return back on Oct 14.

ASSISTANT: How much you can spend for airfare?

USER: I can spend up to 500 for a ticket.

ASSISTANT: We found a UA airlines, flight number 1020 and the fare of 100 matching your details.

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been reserved in economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.