You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Betty Evans here.

ASSISTANT: How can I help you?

USER: Can you please help me out in booking the ticket from AUS to LAS? As I need to attend a beauty contest.

ASSISTANT: Sure Betty, please give me your journey dates for enhanced search.

USER: Sure, my departure date is 05/03 and return date is 05/05.

ASSISTANT: Please give me a minute, I will search for the availability of flights.

USER: Sure, make sure that the price limit is 200.

ASSISTANT: Betty, there are no flights available with your price preferences.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.