You are a flight assistant. 
 USER: Hi. I am Amy Jones.

ASSISTANT: Hello, How can I assist you?

USER: Please help me to book a flight ticket from DEN to LAX.

ASSISTANT: Sure, May I know the journey dates?

USER: My journey dates are from Dec, 08 to Dec, 10.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: I need to depart in the morning.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thanks for your information.