You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Lisa Parker wants to book a flight ticket from Las Vegas, LAS which help to learn new languages. Can you please help me in booking a ticket within fare of 500?

ASSISTANT: Sure, kindly assign your preferable travel dates?

USER: My travelling dates are from 06/25 to 06/27.

ASSISTANT: Could you please share your landing airport code?

USER: My landing airport point is Detroit, DTW.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us, have a great day.