You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I address you?

USER: I am looking for a flight from PHL to DEN. Can you please help me with booking a flight ticket?

ASSISTANT: Ok, I am happy to help you with that. Can you please provide your preferable dates of travelling?

USER: My preferable travel dates are from July 19 to July 21.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight in my journey.

ASSISTANT: Do you need any other requirements?

USER: I prefer a Normal -Cost Airline.

ASSISTANT: May I know your name?

USER: Myself Margaret Jackson.

ASSISTANT: Thanks for providing all your details. We deeply regret to inform that there are no flight going on your way on the dates you requested.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.