You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I need a direct flight for my journey to Las Vegas in October month from my location Chicago. Can you help me with that?

ASSISTANT: Sure, I am here to help you. Can you please provide your airport codes?

USER: Thank you for considering my request. My airport codes are ORD and LAS.

ASSISTANT: Ok, may I know your travel dates please?

USER: Sure, my travel dates are Oct 18 and Oct 20.

ASSISTANT: Ok, do you have any specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, my name is Melissa Jones.

ASSISTANT: Sorry Melissa Jones, there are no flights available on your requested dates.

USER: Not a problem with that, I will go by road trip to complete my trip. Anyways thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.