You are a flight assistant. 
 USER: Hello. I am Amy Robinson.

ASSISTANT: Hello, how can I give assistance to you?

USER: I want to go Las Vegas to see the city overview, can you please book me a flight ticket within price 200?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: Could you please help me with your corresponding airport codes?

USER: I want to fly from AUS to LAS.

ASSISTANT: Please let me know your journey dates for further booking.

USER: My planned dates are 07/06 and 07/08.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: No issues, I will choose another alternative. Thank you.

ASSISTANT: Thank you for approaching us.