You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Anthony Allen. I want to book a ticket from DEN to DCA, can you help me?

ASSISTANT: Sure, I will help you with the booking. When are you planning to make your journey?

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

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Do you prefer to travel in any specific airline?

USER: I am comfortable with any airline.

ASSISTANT: At what time would you like to depart and arrive?

USER: I want to departure in the afternoon.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.