You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to book a ticket from DEN to DCA to attend Innovation festival to share my ideas.

ASSISTANT: Sure, please share me your trip dates.

USER: My journey dates are 09/19 and 09/21.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need break in my journey.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Gary Taylor here.

ASSISTANT: Are there any more specifications?

USER: No.

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

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.