You are a flight assistant. 
 USER: Hello. I am George Hall.

ASSISTANT: Hello, How can I help you now?

USER: Can you please book a flight ticket to reach New York, JFK to attend a business meet?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: On what dates you prefer to travel?

USER: I will start on 09/19 and return on 09/21.

ASSISTANT: May I Know your origin airport?

USER: My boarding point is Las Vegas, LAS.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We regret that, there is no flight found in search to your route on your dates of journey.

USER: It's ok.

ASSISTANT: Thanks for approaching us.

USER: Thank you for the information.