You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am planning to attend music concert at DCA, can you please help me with booking a flight ticket from PHL?

ASSISTANT: Sure, I am gleeful to help you with that. Can you please share your preferable travel dates?

USER: I would like to take off on Aug 18 and return on Aug 20.

ASSISTANT: May I know your name please?

USER: My name is Steven Carter.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.

USER: You are welcome.