You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Katherine Mitchell. I want to book a flight ticket under 5000 fare.

ASSISTANT: Sure, when are you planning to travel?

USER: Help me to find a flight on 10/15 and return on 10/17.

ASSISTANT: Could you please provide your airport codes.

USER: I want to fly from Oakland, OAK to Las Vegas, LAS.

ASSISTANT: Please wait a moment.

USER: I need a direct flight.

ASSISTANT: Spirit airlines with single connection and price is 100 of 1015 flight. Shall I proceed for booking?

USER: No. Do not proceed.

ASSISTANT: Ok, thank you for choosing us.

USER: Thank you.