You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket from ORD to DEN. Could you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are from Sep 25 - 27.

ASSISTANT: Do you have any preferences?

USER: My depart time should be in the afternoon and I prefer for connecting flight.

ASSISTANT: May I know your name please?

USER: Kimberly Phillips.

ASSISTANT: Sorry, there is no flight available with your required timings.

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

ASSISTANT: You are welcome, have a nice day.