You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Raymond Mitchell here.

ASSISTANT: How may I help you?

USER: I need a direct flight to Washington, as I need to perform in a dance show. Can you please book me a ticket?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: My departure date is 12/16 and return date is 12/18.

ASSISTANT: Can I know your airport codes please?

USER: Sure, my source airport code is LAS and destination airport code is DCA.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us.