You are a flight assistant. 
 USER: Hello, Timothy Martinez here.

ASSISTANT: Hello. How can I assist you today?

USER: I have planned to visit National Mall in Washington, so could you please help me to book a flight from DEN to DCA?

ASSISTANT: Sure, will you provide your travelling dates?

USER: My depart is on 09/24 and return would be on 09/26. Make sure that flight should be 1 connected.

ASSISTANT: As per your request, there is a flight with price 100 and the connections 1 is available.

USER: Ok, you can proceed with booking.

ASSISTANT: Your ticket is booked.The flight number is 1019.

USER: Thank you for quick response.

ASSISTANT: Welcome, have a safe journey.