You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please make my reservation from DEN to DCA?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Sure, my travelling dates are Feb 06 and Feb 08.

ASSISTANT: Can you please share your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Sandra Jones.

ASSISTANT: May I know your class preferences?

USER: My class preference is economy.

ASSISTANT: Sandra Jones, there are no flights available in your route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.