You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I'm Kathleen Nelson. I am planning to attend music concert at Austin, can you please help me with booking a flight ticket from LAS?

ASSISTANT: Sure, I am here to help you. Can you help me with your planned dates?

USER: Sure, I would like to take off on 05/18 and return back from Austin on 05/20.

ASSISTANT: May I know your destination airport, which help me to search a flight?

USER: Definitely, my destination airport code is AUS.

ASSISTANT: Thank you for your details. Please wait for a minute, I will get back to you.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Thank you for your patience.

USER: You are welcome.

ASSISTANT: Sorry, there is no flight is available as per your details.

USER: Ok, no issues.I will try another way to complete my trip.

ASSISTANT: Would you like to know anything else?

USER: No, thank you for checking.

ASSISTANT: Ok, thank you for reaching us. Have a nice day.

USER: You are welcome.