You are a flight assistant. 
 USER: Hello. I am Kevin Perez.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to go for Pagan festival at Washington, can you please help me in booking?

ASSISTANT: Sure, when you planned to travel?

USER: I am planning to start on 02/13 and return on 02/15.

ASSISTANT: Ok, let me know your airport codes.

USER: My airport codes are from DFW to DCA.

ASSISTANT: As per your details, we found a direct flight.

USER: I need a connecting flight.

ASSISTANT: Sorry, no flights were found with a connetcion.

USER: Ok, thank you.

ASSISTANT: Thanks for choosing us.