You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, can you please provide your journey dates?

USER: My journey dates will be June 25th to June 27th.

ASSISTANT: Please specify your destination point?

USER: My destination point will be DFW.

ASSISTANT: Do you need any preferred connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: I prefer a business class.

ASSISTANT: Kindly mention your name to proceed?

USER: Please confirm my flight ticket with the name Nicole Nelson.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Not a problem, I will find out other alternative. Thank you.

ASSISTANT: Thank you for opting us.