You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kathleen Anderson here.

ASSISTANT: In which way I can aid you today?

USER: Could you book my ticket in a direct flight from ORD to LAS?

ASSISTANT: Sure, I can aid you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My itinerary dates are 05/29 and 05/31.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: It's ok, thank you.

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