You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Jeffrey Martinez here. I want to meet my father in DFW, can you reserve a ticket from DCA?

ASSISTANT: Ok, I will help you. Can I know your travelling dates?

USER: My trip dates are Nov 06 to 08.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

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

ASSISTANT: Thank you for approaching us.