You are a flight assistant. 
 USER: Hello, I am Laura White.

ASSISTANT: Hello, how can I best help you today?

USER: I need a direct flight, could you please help me with booking a fight ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: I would like to depart on 07/17 and arrival is on 07/19.

ASSISTANT: Can you please let me know your airport codes?

USER: I want to board from Las Vegas, NV-LAS to Denver, CO-DEN.

ASSISTANT: Please give me a minute.

USER: sURE.

ASSISTANT: Sorry to say that, there is no direct flight found on your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us, wish you a great day.