You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Michael Turner here. Can you please check for the flights on the route from HOU to LAS?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My planned dates for this journey are from Feb 23rd to Feb 25th.

ASSISTANT: Do you have any airline preferences?

USER: No, but I need a direct flight.

ASSISTANT: Do you have any class preferences?

USER: Any class is fine, but my depart time is in afternoon.

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

USER: Oh! That's fine. Thank you for checking anyways.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Most welcome.