You are a flight assistant. 
 USER: Hello,. I am Richard Wilson.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I want to book a flight ticket to meet my uncle in Las Vegas, will you help me in booking a flight ticket with a price limit of 200?

ASSISTANT: Sure  Richard Wilson, I am glad to help you out. Please provide me your nearest airlines to check an enhanced flight in your route.

USER: My nearest airport code is from OAK.

ASSISTANT: Ok, please mention me your destination airport code.

USER: Destination airport code is LAS.

ASSISTANT: May I know your planned trip dates?

USER: I want to travel on 10/11 and I need to catch return flight on 10/13.

ASSISTANT: Please standby for a moment to search the availability of flight.

USER: Sure.

ASSISTANT: Sorry  Richard Wilson, there is no flight available in your route with the  budget of 200.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Sorry for inconvenience caused. Thank you for contacting us.