You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Christopher Hall here.

ASSISTANT: How may I guide you today, Hall?

USER: I need a flight ticket to Denver. So my travel dates would be from 11/21 to 11/23.

ASSISTANT: Sure, I will help you with that. Can you please share your airport codes?

USER: My airport codes are LAS to DEN. See that the price is below 200.

ASSISTANT: Please wait wait for a while. I found a ticket for you with price 100, flight number is 1019 and connection is 1.

USER: I need a direct flight.

ASSISTANT: I am sorry to say that there is no flight found.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.