You are a flight assistant. 
 USER: Hello. Brian Turner here.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please check for the flights from DEN to LAX for my business trip?

ASSISTANT: Sure, I am here to help you with that. Can you please share your preferable travel dates?

USER: My journey dates are from Aug 1st to Aug 3rd.

ASSISTANT: Do you have any airline preference?

USER: No, but I need a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My return time is in the evening.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: There are no flights found on this route as per your required details.

USER: Oh! That's sad to know. Anyways, thank you for checking.

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

USER: Welcome.