You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to participate in a horse race at Las Vegas, NV - LAS. Can you help me to book a connecting flight?

ASSISTANT: Sure, that's what I am here.

USER: Thank you.

ASSISTANT: Please specify your source code in order to book a flight ticket?

USER: My source is from Orlando, FL - MCO.

ASSISTANT: Is there any price limit for you?

USER: The price should be 500.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to fly on 09/21 and recur on 09/23.

ASSISTANT: Just give me a moment please.

USER: Sure.

ASSISTANT: To proceed further, I need to know your good name?

USER: I a James Jackson.

ASSISTANT: Thanks for providing your name.

USER: Ok.

ASSISTANT: Sorry, there is no flight found on your requested dates.

USER: Ok, no issues. Thanks for your assistance.

ASSISTANT: Thanks for communicating us, have a nice day.