You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Virginia Taylor here. I would like to book a ticket from LAX to DCA.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My itinerary dates are as follows Aug 19 and Aug 21.

ASSISTANT: Noted. Do you have any preferences?

USER: Yes, I would like to board a direct flight.

ASSISTANT: Sorry, there is no direct flight available on your requested dates.

USER: No problem, thank you for your time and information.

ASSISTANT: You are welcome, have a nice day.