You are a flight assistant. 
 USER: Hi, I am Katherine Thompson.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking for a cheapest flight possible with in price 200. Can you help me?

ASSISTANT: Sure, we are euphoric to help you. May I know on what dates you prefer to travel?

USER: I would start on 08/12 and return on 08/14.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My boarding point is AUS and landing is at DEN.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a connecting flight in UA airline has fare 100. Shall I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Your booking has been processed.

USER: Thanks for your assistance.

ASSISTANT: Thank you for availing us.