You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you find me a flight from DEN to PHL?

ASSISTANT: Sure, let me know your planned journey dates?

USER: I will fly on Dec 02 and return on Dec 04.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I want my depart flight in morning.

ASSISTANT: Can I know your good name?

USER: My name is Mark Jackson.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey locations.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.