You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a flight from DEN to DCA. Can you find me a flight?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I will travel on Feb 3 and return on Feb 5.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I want a business class.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Cynthia Young.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.