You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, May I know the travelling dates?

USER: My planned travel dates are June 01-03.

ASSISTANT: Do you have any connection limit?

USER: I prefer to fly in connected flight.

ASSISTANT: Is there any other requirements?

USER: I want to travel in business class.

ASSISTANT: May I know your name?

USER: Myself, Amy Taylor.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for availing us.