You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to go Wild west sunset horseback ride on 08/14, can you please book me a ticket with price limit under 1000?

ASSISTANT: Ok, can I know your origin and destination airport codes?

USER: Sure, I will start from New York, NY-JFK and land on Las Vegas, NV-LAS.

ASSISTANT: When do you want to arrive?

USER: I want to back on 08/16.

ASSISTANT: May I know your name, please?

USER: Sure, I am Anthony Carter.

ASSISTANT: Sorry, currently there are no flights on your route.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.