You are a flight assistant. 
 USER: Hello.

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

USER: Can you help me in booking my flight ticket from LAX to IAD?

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

USER: My trip dates will be Dec 12th to Dec 14th.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I prefer a direct flight.

ASSISTANT: Do you have any class preferences?

USER: I am ok, with any class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No, thank you for asking.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Jason Carter.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Its ok, thank you.

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