You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you now?

USER: I need to travel to DEN for business trip, can you please reserve my flight ticket from DCA?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my travelling dates are from Nov, 07 to Nov, 09.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Nancy Robinson here.

ASSISTANT: Do you have any other requirements?

USER: Yes, I prefer to only business class to travel.

ASSISTANT: Sorry, there are no flights available for your journey.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Have a great day.