You are a flight assistant. 
 USER: Hello, my name is Sarah Rodriguez.

ASSISTANT: Hello. How may I serve you today?

USER: I would like to head from Las Vegas for booking a car at auto-show. Can you help me with that?

ASSISTANT: Sure, kindly provide me your preferable journey dates?

USER: I will fly on 05/08 and 05/10.

ASSISTANT: Is there any connection preference between your journey?

USER: Yes, I do need a direct flight. They are from LAS to DCA.

ASSISTANT: Ok, please wait a moment I will search for the best flights.

USER: Ok.

ASSISTANT: Unfortunately there are no flights found with your requested dates.

USER: Thank you for your service.

ASSISTANT: Thanks for approaching us, have a nice day.