You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a Seminar in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are LAS and IAD.

ASSISTANT: Can you please share your planned travel dates?

USER: My travelling dates are Oct 26 and Oct 28.

ASSISTANT: Do you want connecting flight or direct flight?

USER: Direct flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer normal cost airline.

ASSISTANT: May I know your name please?

USER: My name is Jessica Clark.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for opting us.