You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kimberly Thompson here.

ASSISTANT: How can I help you today?

USER: I am looking for a direct flight from LAS to IAD. Please help me in booking a ticket.

ASSISTANT:  Sure, I am at your service to help you. Can you please provide your planned dates?

USER: My trip dates are 12/27 and 12/29.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry for the inconvenience, no direct flights available as per your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: My pleasure, have a nice day.