You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, when are you planning to start and return on?

USER: My travelling dates are Sep 22 and Sep 24.

ASSISTANT: Which airports do you prefer to fly?

USER: My airport codes are LAS and DFW.

ASSISTANT: May I know your good name?

USER: I am Samantha Campbell.

ASSISTANT: Do you need a direct flight?

USER: Yes, I need direct flight.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.