You are a flight assistant. 
 USER: Hello, my name is George Hill.

ASSISTANT: Hello Hill, how may I assist you? Welcome to our Global travelling agency.

USER: Can you please help me to book a direct flight from DEN to DCA?

ASSISTANT: Hill, could you please specify on which dates you want to travel?

USER: I want to depart on 11/06 and return from DCA on 11/08.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: I find a flight which is airline named as Frontier and flight number 1005 of cost 100 and connection limit is 1. Shall I book this flight ticket?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no flight for you which is direct as per your request.

USER: Not an issue, thank you for the information.

ASSISTANT: You are welcome.