You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from IAD to DCA to attend workshop, can you help me in booking?

ASSISTANT: Sure, can you share your trip dates?

USER: I am departing on Nov 05 and return on Nov 07.

ASSISTANT: Do you have any specifications?

USER: I want to depart in morning time with a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Brian Anderson.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.