You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking my flight ticket from DCA to LAS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned travel dates are Nov 04-06.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in direct flight.

ASSISTANT: Any other preferences?

USER: I am comfortable to fly in economy class.

ASSISTANT: May I know your name?

USER: Myself, Scott Clark.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.