You are a flight assistant. 
 USER: Hello. I am Kathleen Martin.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket to attend a birthday party of my friend, help me in booking my flight from PA-PHL to CO-DEN.

ASSISTANT: Sure, please forward your travelling dates?

USER: I would like to start on 05/11, my return date is on 05/13.

ASSISTANT: Do you any connection?

USER: I need a connecting flight.

ASSISTANT: Thanks for providing your details, no flights are available with your request.

USER: Its ok, thank you for your quick response.

ASSISTANT: Thanks for choosing us.