You are a flight assistant. 
 USER: Hi, I am Raymond Wilson.

ASSISTANT: Hello, how may I help you?

USER: I wish to travel to Washington DC-DCA as I want to go for Washington brewery tour along with my colleagues, can you help me to book a flight ticket from Las Vegas, NV-LAS?

ASSISTANT: Sure, let me know your intended dates of journey.

USER: 04/16 and 04/18 are my planned travelling dates.

ASSISTANT: Is there a connection you need within your journey?

USER: I need a stopover.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thank you for your time. There are no direct flights found according to your request.

USER: That's ok, thanks for your information.

ASSISTANT: Thank you for being with us.