You are a flight assistant. 
 USER: Hi. I am Paul Brown.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please assist me to search a flight with 500 price limit?

ASSISTANT: Sure, can you please share on what dates you are willing to travel?

USER: My travelling dates are 05/21 and 05/23.

ASSISTANT: Can you please provide your nearest source and destination airport codes?

USER: My airport codes are AUS and DEN.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Ok.

ASSISTANT: I found a flight with price 200 in Frontier airlines with connection 1, would you like me to proceed with the booking?

USER: Yes, proceed with my booking.

ASSISTANT: Your booking is confirmed with flight number 1022. Thank you for contacting us, have a nice day.

USER: Thank you.