You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to travel from DFW to DCA, can you help me in doing that?

ASSISTANT: Sure, please share me your trip dates.

USER: My journey dates are Dec 09 to 11.

ASSISTANT: Please share your connection limit.

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Christopher Thomas.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in business class.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for availing us.