You are a flight assistant. 
 USER: Hello. I am Patrick Williams.

ASSISTANT: Hello, how may I assist you today?

USER: I planned to meet my cousin in LAX, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, let me know your travelling dates?

USER: I prefer to travel on Feb 5 and Feb 7.

ASSISTANT: May I know your depart and arrival timings?

USER: I would like to return in afternoon.

ASSISTANT: Do you prefer direct or connecting flight?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flight found on your journey routes.

USER: Ok, no problem. Thank you for your information.

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